number plate

Word family

• number
  nounA1
• plate
  nounA2
• license plate
  nounA2
• registration plate
  nounB1

Synonym discussion

Sense: noun/1

All four terms refer to the same physical object — the plate on a vehicle that shows its official registration. The main difference is regional: 'number plate' is the standard term in British English and across most of the Commonwealth, while 'license plate' is the dominant term in American and Canadian English. 'Registration plate' is a more formal alternative used in official documents and legal contexts in both varieties. 'Tag' is an informal American term that can refer either to the plate itself or, more commonly, to the annual registration sticker affixed to the plate. In writing, 'number plate' and 'license plate' are both two-word compounds; 'numberplate' as a single word is occasionally seen but less standard. For example, a British driver would say 'I need to renew my number plate', whereas an American driver would say 'I need to renew my license plate.'

Common collocations

Etymology

The compound noun 'number plate' dates back to the early 1900s, when motor vehicles began to require official identification numbers for registration. 'Number' comes from Old French 'nombre', from Latin 'numerus', and 'plate' comes from Old French 'plate', meaning a flat piece of metal, from Medieval Latin 'plata'. The term originally referred to the metal plate on which the registration number was displayed.