- 1[uncountable, countable] the abbreviation for‘identification’or‘identity’(an official way of showing who you are, for example a document with your name, date of birth, and often a photograph on it) You must carry ID at all times. The police checked IDs at the gate. an ID card
Definitions on the go
Look up any word in the dictionary offline, anytime, anywhere with the Oxford Advanced Learner’s Dictionary app.
- 2[countable]identificationThe police need a witness to make a positive ID. see caller ID
Check pronunciation: ID