Synonyms of number one

Noun

1. number one, self

usage: a reference to yourself or myself etc.; `take care of number one' means to put your own interests first

2. first, number one, rank

usage: the first or highest in an ordering or series; "He wanted to be the first"

3. first, number one, number 1, ordinal number, ordinal, no.

usage: the first element in a countable series; "the first of the month"