Definition - What does In Limine mean?
In limine means before the trial begins, and it usually refers to motions to withdraw or suppress evidence before the trial commences. Such motions are called motions in limine. In limine is Latin for "at the threshold." So, in the context of law, the threshold is the beginning of the trial.
Justipedia explains In Limine
An example of a motion in limine would be a lawyer who makes a motion before the trial begins to get certain evidence from a police officer thrown out because the police officer forgot to read the suspect the Miranda warning. In such circumstances, the judge can either approve the motion or reject it. If it gets rejected, then the evidence will stay available to be used in the trial. Lawyers often try to get evidence that they believe is unlawful dismissed.