Alibi/ˈæləbaɪ/ Definition 1 of 2Pro Tip 1/3Primarily Legal The term 'alibi' is primarily used in legal contexts to refer to evidence for innocence. The defendant's alibi was supported by video footage. Pro Tip 2/3Beyond Presence 'Alibi' doesn't just mean you were elsewhere; it must prove you couldn't commit the crime. She had an alibi showing she was abroad during the heist. Pro Tip 3/3Not Always True An alibi can be false; questioning its validity is common in legal disputes. His alibi was scrutinized to confirm if it was fabricated.