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English definition of “one”

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one

pronoun
 
 
/wʌn/
PARTICULAR PERSON/THING A2 used to refer to a particular person or thing in a group that has already been talked about: I've just made some biscuits, do you want one? Throw those gloves away and get some new ones. Chris is the one with glasses.Single, double and multipleParticular and individualPersonal pronouns
GENERAL formal any person in general: One ought to respect one's parents.Personal pronouns
one at a time B2 separately: Eat them one at a time.Order and sequenceSimultaneous and consecutive
one by one B2 separately, with one thing happening after another: One by one the old buildings have been demolished.Order and sequenceSimultaneous and consecutive
one another B1 each other: How can they reach an agreement if they won't talk to one another?Reciprocating
(all) in one combined into a single thing: It's a vacation and art course all in one.Single, double and multiple
(Definition of one pronoun from the Cambridge Learners Dictionary © Cambridge University Press)
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