Dictionary.net

(law) the disqualification of a judge or jury by reason of prejudice or conflict of interest; a judge can be recused by objections of either party or judges can disqualify themselves

(law) the disqualification of a judge or jury by reason of prejudice or conflict of interest; a judge can be recused by objections of either party or judges can disqualify themselves

A situation in which a judge or prosecutor is removed or steps down from a case. This often happens when the judge or prosecutor has a conflict of interest -- for example, a prior relationship with one of the parties.