Definition of "alibi"

noun:
- The plea or mode of defense under which a person on trial for a crime proves or attempts to prove that he was in another place when the alleged act was committed; as, to set up an alibi; to prove an alibi.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License
verb:
- To provide an alibi for.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License
- To provide an excuse for.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License