one is one of the 1000 most common headwords.
once - one - only
English numbers (edit)
10
 ←  0 1 2  →  10  → 
    Cardinal: one
    Ordinal: first
    Frequency: once
    Multiplier: single
    Distributive: singly
    Fractional: whole
    Number of musicians: solo

Pronunciation

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Determiner

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Determiner
one

  1. (number) (indefinite) (singular) (count) (ordinal first) The number 1.
    We have one nose and one mouth.

Singular
one

Plural
ones

 
one
  1. The number 1.
    One is the smallest whole number.

Pronoun

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Pronoun
one

  1. (personal) One is a singular pronoun which means someone or people. It is used more often in formal writing.
    It is easy to see the difference if one looks closely enough.
Singular Plural
Subject Object Possessive 1 Possessive 2 Reflexive Subject Object Possessive 1 Possessive 2 Reflexive
First I me my mine myself we us our ours ourselves
Second you you your yours yourself you you your yours yourselves
Third Feminine she her her hers herself they them their theirs themselves
Masculine he him his his himself
Impersonal it it its its itself