al·i·bi 
/ˈæləˌbaɪ/ noun
plural al·i·bis /ˈæləˌbaɪ/ noun [count] 1 : a claim that you cannot be guilty of a crime because you were somewhere else when the crime was committed
▪ Nobody could confirm his alibi that he was at the movies. ▪ He has an ironclad/perfect alibi. [=an alibi that cannot be proved false] ; also : evidence which shows that such a claim is true
▪ Her doctor is her alibi: she was in surgery at the time of the murder. 2 : an excuse for not being somewhere or doing something
▪ She made up an alibi for why she missed the meeting.
▪ Nobody could confirm his alibi that he was at the movies. ▪ He has an ironclad/perfect alibi. [=an alibi that cannot be proved false] ; also : evidence which shows that such a claim is true
▪ Her doctor is her alibi: she was in surgery at the time of the murder.
▪ She made up an alibi for why she missed the meeting.
