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.
SingularPlural
SubjectObjectPossessive 1Possessive 2ReflexiveSubjectObjectPossessive 1Possessive 2Reflexive
First Imemyminemyselfweusouroursourselves
Second youyouyouryoursyourselfyouyouyouryoursyourselves
Third Feminine sheherherhersherselftheythemtheirtheirsthemselves
Masculine hehimhishishimself
Impersonal itititsitsitself