1
one
noun
- the number 1
- a one-dollar bill
- one o'clock
2
one
pronoun
- that person or thing
- someone or something that is a part of a particular group—+ of
- people in general : any person
3
one
adjective
- having the value of 1
- —used to refer to a single person or thing
- —used before a noun to indicate that someone or something is part of a group of similar people or things