Al·i·bi n. Law The plea or mode of defense under which a person on trial for a crime proves or attempts to prove that he was in another place when the alleged act was committed; as, to set up an alibi; to prove an alibi.
n 1: (law) a defense by an accused person purporting to show that
he or she could not have committed the crime in question
2: a defense of some offensive behavior or some failure to keep
a promise etc.; "he kept finding excuses to stay"; "every
day he had a new alibi for not getting a job"; "his
transparent self-justification was unacceptable" [syn: excuse,
v : exonerate by means of an alibi