- 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
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- 2[countable]identificationThe police need a witness to make a positive ID. see caller ID
Check pronunciation: ID