ALIBI

[noun] [C] - proof that someone who is thought to have committed a crime could not have done it, esp. the fact or claim that they were in another place at the time it happenedHe has a cast-iron (= very strong) alibi - he was in hospital the week of the murder.An alibi is also an excuse for something bad or for a failure.After eight years in power, the government can no longer use the previous government's policy as an alibi for its own failure.