- number one - a reference to yourself or myself etc.; `take care of number one' means to put your own interests first
--1 is a kind of self
- first, number one - the first or highest in an ordering or series; "He wanted to be the first"
--2 is a kind of rank
--2 has particulars: former- first, number one, number 1 - the first element in a countable series; "the first of the month"
--3 is a kind of ordinal number, ordinal, no.
- first, number one - the first or highest in an ordering or series; "He wanted to be the first"