one Definition

  • 1the number 1
  • 2used to refer to a person or thing previously mentioned or easily identified
  • 3used to emphasize how small an amount is

Using one: Examples

Take a moment to familiarize yourself with how "one" can be used in various situations through the following examples!

  • Example

    I have one apple left.

  • Example

    One of my friends is coming over tonight.

  • Example

    I only have one dollar in my wallet.

one Synonyms and Antonyms

Synonyms for one

Antonyms for one

Phrases with one

  • one and only

    the unique or exclusive person or thing


    She is my one and only true love.

  • individually or separately


    The students were called to the front of the class one by one to receive their awards.

  • unique or unusual


    That antique vase is one of a kind and very valuable.

Origins of one

from Old English 'ān'


Summary: one in Brief

The word 'one' [wʌn] can be used as a noun, pronoun, adjective, or adverb. It refers to the number 1, a previously mentioned or identified person or thing, or emphasizes a small amount. Phrases like 'one and only' denote exclusivity, while 'one by one' means individually. 'One of a kind' describes something unique.

How do native speakers use this expression?