authenticationcode
nounUK /ɔːˌθentɪˈkeɪʃən kəʊd/
US /ɔːˌθentɪˈkeɪʃən koʊd/
A special set of letters or numbers that proves you are allowed to use something.
The app sent me an authentication code by text before I could log in.
RELATED WORDS
OTHER MEANINGS
2. A code used to confirm that a message or document is genuine and has not been changed.
The bank checked the authentication code on the transfer to make sure it was real.
3. A short number sent to your phone or email that you type in to prove it is really you.
Enter the six-digit authentication code to finish signing in.
4. A secret string that a computer program uses to prove its identity to another program.
The server rejected the request because the authentication code had expired.