noun
pin
A personal identification number used to authorize access.
I enter my pin to withdraw cash from the ATM.
Etymology
PIN is formed from the initials of personal identification number. The shortened name identifies the numeric code used to verify authorization.
More examples
- Your phone asks for a pin after it restarts.
- She keeps her pin secret, even from close friends.
- The bank lets customers choose their own pins.
Forms
pin · pins
Similar words
- passcode
- An access code that may include letters as well as numbers.
- password
- A secret word or string, rather than specifically a number.