alibi

/ˈæl·əˌbɑɪ/ n [C]

Definition

› proof that someone who is thought to have committed a crime could not have done it, esp. the fact or claim that the person was in another place at the time the crime happened › An alibi is also an excuse for something: You’re late again – what’s your alibi this time?

(Definition of alibi n from the Cambridge Academic Content Dictionary © Cambridge University Press)