(law) a defense by an accused person purporting to show that he or she could not have committed the crime in question
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"
The plea or mode of defense under which a person on trial for a crime proves or attempts to prove being in another place when the alleged act was committed
exonerate by means of an alibi
To provide an alibi for.