verificationpin
nounUK /ˌverɪfɪˈkeɪʃən pɪn/
US /ˌverɪfɪˈkeɪʃən pɪn/
A short secret number you type to prove it is really you.
The app sent a verification pin to my phone before I could log in.
OTHER MEANINGS
2. A small metal pin given as proof that something is true or official.
The guard checked the verification pin on her badge before letting her in.
3. A code used to confirm that an email address or phone number belongs to you.
Enter the verification pin from the email to finish signing up.
4. A temporary number that expires after a short time for safety.
The verification pin expires in five minutes, so type it quickly.