the most important or best person or thing
Example:
- We're number one in the used car business.
the pop song or recording that has sold the most copies/had the most downloads in a particular week
Example:
- The new album went straight to number one.
- She's had three number ones.
yourself
Example:
- Looking after number one is all she thinks about.
an expression used especially by children or when speaking to children to talk about passing liquid waste from the body
Example:
- It's only a number one.
Related words and phrases