False Imprisonment - depriving someone of freedom of movement by holding a person in a confined space or by physical restraint including being locked in a car, driven about without opportunity to get out, being tied to a chair or locked in a closet. It may be the follow-up to a false arrest, but more often it resembles a kidnapping with no belief or claim of a legal right to hold the person. Therefore, false imprisonment is often a crime and if proved is almost always the basis of a lawsuit for damages.
Source: http://dictionary.law.com/Default.aspx?selected=728
Source: http://dictionary.law.com/Default.aspx?selected=728