If you’ve ever sat through a hearing or read a court filing and lost the thread, it’s usually the vocabulary. Courts run on a set of common legal terms and phrases that carry precise meanings, and knowing them keeps you from missing a deadline, misreading a ruling, or being blindsided by what comes next. What follows is a working glossary of the words you’re most likely to encounter in civil and criminal cases, grouped by where they show up.
Who’s Who in the Courtroom
A few officials keep every courtroom running. The bailiff maintains order and safety, escorts jurors, and swears in witnesses. The court clerk manages the judge’s calendar and processes formal records. The court reporter captures every spoken word on a specialized machine to produce the official transcript, which becomes the permanent record and the document an appeals court reviews if the case is challenged.
The parties carry different titles depending on the type of case. In a civil lawsuit, the plaintiff files the case against the defendant. In family law and some other proceedings, those same roles are called petitioner and respondent. In criminal cases, the government brings charges against the defendant through a prosecutor. Someone who represents themselves without a lawyer is a pro se litigant, from the Latin for “for oneself.”
Each party’s lead lawyer is generally called counsel. Additional lawyers on the same side are co-counsel. The attorney of record is the lawyer officially listed with the court as responsible for a party’s case, and that designation matters because the court sends all notices and orders to that person.
Types of Witnesses
A lay witness testifies only about things they personally saw, heard, or experienced. Their opinions are limited to what any ordinary person could observe: what someone looked like, how fast a car was going, whether a room was dark. They can’t offer opinions that require technical or specialized knowledge.
An expert witness is someone qualified by education, training, or professional experience to give specialized opinions. Accident reconstruction engineers, forensic accountants, and medical specialists all testify as experts. Under federal rules, the opinion must rest on reliable methods and sufficient facts, and the party calling the expert has to show the court the opinion is more likely than not based on sound reasoning.
To impeach a witness is to attack their credibility during cross-examination by exposing inconsistencies, bias, or dishonesty. Any party can impeach any witness, including one they called themselves.
Documents That Move a Case
Every case starts with paperwork. In a civil case, the complaint is the opening document, a written statement identifying what the defendant allegedly did and what relief the plaintiff wants. A criminal case also begins with a complaint, but there it’s a sworn document filed by the government alleging a crime and establishing probable cause.
A summons goes out with the complaint to officially notify the defendant that a case has been filed and that a response is required. Together those two documents set the case in motion.
An affidavit is a written statement signed under oath, often used as evidence when a witness can’t appear in person. A subpoena is a court order compelling someone to testify or produce documents; ignoring one can bring contempt penalties. A motion is a formal written request asking the judge to rule on a specific issue.
What Happens During a Case
Once a case is active, both sides enter discovery, where they exchange evidence and interview witnesses. Discovery can include interrogatories (written questions), requests to produce documents, and depositions, which are sworn, recorded interviews conducted outside the courtroom. Straightforward disputes may finish discovery in a few months; complex litigation can stretch well over a year.
In criminal cases, the defendant’s first court appearance usually happens the same day or the day after an arrest. The defendant learns the charges, arrangements are made for an attorney, and the judge decides whether to hold the defendant in custody or release them. Depending on the jurisdiction, this hearing is called an arraignment, an initial hearing, or a first appearance, and it can take place anywhere from 24 to 96 hours after arrest.
When either side needs more time, they can ask for a continuance, a request to push back a hearing or trial date. Courts grant them for legitimate reasons like newly discovered evidence or an unavailable witness, but judges are generally reluctant to delay without good cause.
Bail and Bond
Bail is the amount of money or set of conditions the court imposes for a defendant’s release before trial. A bond is the financial guarantee, posted by the defendant, a family member, or a bail bond company, that the defendant will appear at future court dates. Skipping court forfeits the bond. Bail isn’t automatic; judges can deny it when the defendant is considered a flight risk or a danger to the community.
Objections and Rulings
During a hearing or trial, attorneys use objections to stop the other side from presenting improper evidence or asking prohibited questions, such as ones based on hearsay, an out-of-court statement offered to prove the truth of what it asserts. If the judge agrees, the ruling is sustained and the question is blocked. If the judge disagrees, the ruling is overruled and questioning continues. Those quick rulings control what actually reaches the jury.
Jury Selection
Before a jury trial begins, prospective jurors go through voir dire, a French phrase meaning “to speak the truth.” The judge and attorneys question potential jurors to identify anyone who can’t be impartial. Lawyers can remove prospective jurors for cause, based on a specific demonstrated bias, or through a limited number of peremptory challenges, which don’t require a stated reason.
How Much Proof Is Needed
Courts apply different standards of proof depending on the type of case, and the gap between them is large.
- Preponderance of the evidence. The standard in most civil cases. The plaintiff wins by showing their version is more likely true than not, sometimes described as tipping the scales just past 50 percent.
- Clear and convincing evidence. A higher bar used in certain civil matters like fraud claims and disputes over wills. The evidence must make the claim highly probable, not just slightly more likely.
- Beyond a reasonable doubt. The standard for criminal convictions and the highest burden in the legal system. The evidence must be strong enough that no reasonable person would question the defendant’s guilt. If any rational doubt remains, the jury must acquit.
The differences explain how someone can be found “not guilty” in a criminal trial but still lose a civil lawsuit over the same incident. The civil case required far less proof.
Latin Phrases You’ll Hear
Latin turns up constantly in court, and each phrase compresses a specific concept into shorthand that lawyers and judges use daily.
Habeas corpus, literally “you have the body,” is a protection against unlawful imprisonment. It lets a detained person petition a court to review whether their confinement is legal.
Prima facie, meaning “at first sight,” describes a case where the evidence, taken at face value, is strong enough to support a verdict unless the other side successfully rebuts it. When a judge says the plaintiff has established a prima facie case, there is enough to move forward, not that the plaintiff has won.
In camera, meaning “in chambers” or “in private,” refers to proceedings conducted outside the public eye. A judge might review sensitive documents in camera before deciding whether they should be shared with the jury.
Pro bono, short for “pro bono publico” (“for the public good”), describes legal work done for free. Many attorneys take pro bono cases to represent people who can’t afford a lawyer.
A writ of certiorari is the formal request asking a higher court, most commonly the U.S. Supreme Court, to review a lower court’s decision. Granting cert means the court has agreed to hear the appeal.
Contempt of court means disobeying a court order or disrupting proceedings. It comes in two forms: civil contempt, used to pressure someone into complying with an order, and criminal contempt, used to punish defiance. A judge can impose fines or jail time for contempt.
How a Case Ends
The resolution comes with its own vocabulary, and the distinctions matter because they determine what happens next.
A verdict is the jury’s decision on guilt or innocence in a criminal case, or on who wins in a civil case. A judgment is the judge’s official order that formally resolves the dispute. In criminal cases, the punishment is the sentence, which can include fines, probation, community service, prison time, or some combination.
Dismissals split into two kinds. A case dismissed without prejudice can be refiled later, usually after the plaintiff fixes whatever procedural problem caused the dismissal. A dismissal with prejudice is final, and the same claim can never be brought back.
Courts can also order restitution in criminal cases, requiring the defendant to compensate the victim for losses like medical bills, property damage, or stolen money. Restitution is not the same as a fine. Fines are paid to the government as punishment; restitution goes directly to the person who was harmed.
Supervision After a Sentence
A conviction doesn’t always mean prison. Courts use several forms of supervision.
Probation is an alternative to incarceration. The defendant is released under the oversight of a probation officer with conditions attached, such as holding a job, attending counseling, avoiding alcohol, or staying away from certain people. Violations can send the defendant back before the judge to face the prison time probation was meant to replace.
Parole is different. It’s an early release from prison, typically based on a defendant’s behavior while incarcerated. Someone on parole serves the remainder of their sentence in the community under a parole officer’s supervision. Supervised release is similar but applies in federal cases and begins after a defendant finishes the full prison term, rather than substituting for it.
A stay of execution, in this context, has nothing to do with the death penalty. It means the court postpones enforcement of a sentence. A judge might stay a prison sentence during an appeal or while the defendant completes probation. If the defendant violates the terms, the stay is lifted and the original sentence takes effect.
Appeals
Losing at trial isn’t necessarily the end. The losing party, called the appellant, can ask a higher court to review the decision. The party defending the outcome is the appellee.
Appeals courts don’t retry the case or hear new evidence. They review the trial court’s record for legal errors that affected the outcome. An appellate court can do one of three things:
- Affirm. Uphold the lower court’s decision, leaving it in place.
- Reverse. Overturn the lower court’s decision because a legal error was made.
- Remand. Send the case back to the lower court for further proceedings, often a new trial or a corrected ruling based on the appellate court’s instructions.
A single appeal can mix these outcomes. An appellate court might affirm the conviction but reverse the sentence and remand for resentencing.
Cases headed to the U.S. Supreme Court get there through a writ of certiorari. The Court receives thousands of petitions each year and hears only a small fraction. A denial of certiorari doesn’t mean the lower court was right; it means the Supreme Court chose not to take the case.
Deadlines and Deals
A statute of limitations is the deadline for filing a lawsuit or criminal charge. Once it expires, the claim is barred regardless of its merit. Deadlines vary widely by case type. Personal injury claims, contract disputes, and criminal offenses all have different windows, and missing one is a common way people forfeit otherwise valid claims.
A plea bargain is an agreement between the prosecutor and the defendant in a criminal case. The defendant agrees to plead guilty to a lesser charge or to one of several charges, and in exchange the prosecutor recommends a lighter sentence or drops remaining charges. Most criminal cases are resolved this way rather than by trial. A judge must approve any plea agreement, and the defendant has to acknowledge that the plea is voluntary.