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

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

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

Number One, in "The Cage", the original pilot episode of the science fiction television series Star Trek, was the un-named intellectual, problem-solving second-in-command serving under Captain Christopher Pike. Number One is the naval term for the First Officer on board a ship, second-in-command to the captain.

"Number One" is an episode of the American sitcom My Name Is Earl; it is the final episode of the first season.

N°1, otherwise known as Number One, is an apprentice warlock demon Artemis Fowl: The Lost Colony from the Artemis Fowl series by Irish fiction author Eoin Colfer.

Number One is a brand new, original villain for The Batman. He was voiced by Diedrich Bader. He first appeared in The Breakout.