Definitions:

1. A set of numbers, letters, or symbols that is used to represent a piece of data or a process in a computer program. NOUN
   • The Vendor ID and Device ID registers identify the device, and are commonly called the PCI ID.
2. Abbreviation for identification: any official card or document with your name and photograph or other information on it that you use to prove who you are. ABBREVIATION
   • Do you have an ID? A driving license or cheque card will do.
3. To ask someone for identification to prove who or how old they are. VERB
   • They IDed me when I tried to buy a beer.
4. To look at a person or body and say who that person is to someone in authority. VERB
   • He had to go to the morgue to ID the body.

Synonyms:

• designate
• determine
• distinguish
• Identify
• place
• recognize
• single out
• specify
• verify