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English definition of “a”

a

determiner (also an)
 
 
strong // weak /ə/
BEFORE NOUN A1 used before a noun to refer to a single thing or person but not a particular thing or person or not one that you have referred to before: I need a new car. I bought a nice coat yesterday. I saw a woman speaking to him.
ONE A1 one: a hundred dollars a dozen eggsSingle, double and multiple
EVERY/EACH A1 every or each: A child needs love. Take one tablet three times a (= each) day.Both, all, each and every
TYPE A1 used to say what type of thing or person something or someone is: It's a guinea pig. She's a doctor.
AN ACTION A2 used before some action nouns when referring to one example of the action: Take a look at this.UK I'm just going to have a wash.
TWO NOUNS A2 used before the first of two nouns that are often used together: a cup and saucer
AMOUNTS A2 used before some phrases saying how much of something there is: a few days a bit of sugar
NAME used before a person's name when referring to someone you do not know: There's a Ms Leeming to see you.
(Definition of a determiner from the Cambridge Learners Dictionary © Cambridge University Press)
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