Law . the defense by an accused person of having been elsewhere at the time an alleged offense was committed.

an excuse, esp. to avoid blame.

a person used as one's excuse

My sick grandmother was my alibi for missing school.

Informal . to give an excuse; offer a defense

to alibi for being late.

Informal .

to provide an alibi for (someone)

He alibied his friend out of a fix.

to make or find (one's way) by using alibis

to alibi one's way out of work.

noun

account , affirmation , airtight case , allegation , answer , assertion , assurance , avowal , case , cop-out , cover , declaration , excuse , explanation , fish story * , justification , plea , pretext , profession , proof , reason , reply , retort , song and dance * , stall , statement , vindicationnotes:an alias is an assumed name , an alibi is a form of defense whereby a defendant attempts to prove that he or she was elsewhere when the crime in question was committed , while an excuse is an explanation offered to justify or obtain forgiveness