Number one

Pronunciation: /ˈnəmbɝ ˈwən/

Number one (noun)

  1. The person or thing that is in the first position in a list, race, or ranking.
  2. The most important thing that should be done or considered first.
  3. The leading person or group, considered the strongest or most successful.

Examples

  • She won number one in the race.
  • They placed number one after the final test.