Meaning of the word "registration number" in English

What does "registration number" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

registration number

US /ˌrɛdʒ.ɪˈstreɪ.ʃən ˈnʌm.bər/
UK /ˌrɛdʒ.ɪˈstreɪ.ʃən ˈnʌm.bər/

Noun

a unique sequence of letters and numbers assigned to a vehicle, aircraft, or other item for identification purposes

Example:
Please provide the vehicle's registration number when reporting an accident.
The police traced the car by its registration number.