D defs.my
Entry 1 sense Webster, 1913

Alibi

/ăl'-əb-īˌ/ · Al·i·bi · IPA /ˈæl.ə.baɪ/
01 n. 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 all…
  1. 1.
    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.(Law)