False imprisonment is a criminal offence that regards the illegal restriction of an individual's freedom to move. This can include unlawful arrest, but it doesn't have to involve a prison, it can mean being locked in a room or building.

Intentionally restraining another person against their will without the legal right to do so. Physical force is not necessary; threats or a show of apparent authority are sufficient.

wrongful imprisonment of a person contrary to law, without due process and the benefits of normal legal safeguards, e.g., Miranda rights.

(law) confinement without legal authority

The crime of making a false arrest or unlawfully taking someone into custody.

Imprisonment of a person when there is no legal authorisation for the imprisonment. A person who is falsely imprisoned may take legal action.• Personal Safety

Detaining someone in custody without lawful excuse.

Confinement or detention of a person without sufficient authority. A victim of false imprisonment could sue for habeas corpus, or for damages, usually using the form of action of trespass.

The unlawful detention of a person who is held against his or her will without authority or justification.

The detainment or arrest of a person without a warrant, with an illegal warrant, or with a warrant illegally executed. So long as the person is deprived of his personal liberty, the amount of time actually detained is inconsequential. See, e.g. Schenck v. Pro Choice Network, 519 U.S. 357 (1997) (Wex)

The unlawful detainment of another person. This happens when one person deprives another of freedom of movement by holding that person in a confined space or by physical restraint. Examples include being locked in a car without opportunity to get out, being tied to a chair, or being locked in a closet.

Intentionally restraining another person without having the legal right to do so. It's not necessary that physical force be used; threats or a show of apparent authority are sufficient. False imprisonment is a misdemeanor and a tort (a civil wrong). If the perpetrator confines the victim for a substantial period of time (or moves him a significant distance) in order to commit a felony, the false imprisonment may become a kidnapping. People who are arrested and get the charges dropped, or are later acquitted, often think that they can sue the arresting officer for false imprisonment (also known as false arrest). These lawsuits rarely succeed: As long as the officer had probable cause to arrest the person, the officer will not be liable for a false arrest, even if it turns out later that the information the officer relied upon was incorrect.

individuals who are unjustifiably detained, or confined against their will and without a legal warrant for detention.

The intentional restraint of an other's freedom of movement by physical action or the threat of force.

False imprisonment is a tort, and possibly a crime, wherein a person is intentionally confined without legal authority.