Definitions

1. noun

A number, especially a telephone number.

“The company’s numero is 1-800-HELP-ME.”

2. noun

A number or a numerical position in a sequence, especially in a list or a ranking.

“The numero uno in the bestseller list is ‘The Great Gatsby’.”

3. noun

A position or ranking, especially in a competition or a hierarchy.

“The numero uno seed in the tennis tournament is Novak Djokovic.”

4. adjective

First or highest in a ranking or a hierarchy.

“The numero uno in the company is the CEO.”