number one
idiomPart ofnumber
number one — idiom
1. the best, most important, or most successful person or thing in a particular gro
1.idiom
Definition
the best, most important, or most successful person or thing in a particular group or field.
Example
Eve practised every day, determined to become number one in the regional tennis competition.
The song quickly rose to number one on the streaming charts and stayed there for weeks.