Definition - What does Proffer mean?
To proffer is to bring forth something to be accepted or rejected. In the context of the law, proffer most commonly refers to things that are presented as evidence in a trial to be used to support a position. Once proffered, the evidence can be accepted or rejected by the judge, based on its legality and relevance.
Justipedia explains Proffer
Even if evidence that is proffered at a trial has a high degree of relevance to the case, it can still be rejected by the judge if it was illegally gathered. For example, if a lawyer or law enforcement members searched a home without a warrant, any evidence they found inside could be dismissed. Also, if law enforcement got a statement from an arrested person without reciting the Miranda warning to him or her, then this evidence too could be dismissed by a judge.