a

determiner (ONE)

weak /ə/ strong /eɪ/ (also an)

Definition

A1 one: a hundred a thousand a dozen There were three men and a woman.Cardinal numbers, including nought and zero A2 used between a fraction and a unit of measurement: half a mile a quarter of a kilo three quarters of an hour six tenths of a secondFractions A2 used when saying how often something happens in a certain period: Take one tablet three times a day. I swim once a week.Both, all, each and every A2 used when saying how much someone earns or how much something costs in a certain period: She earns $100,000 a year. My plumber charges £20 an hour. I pay £5 a week for my parking permit.Both, all, each and every

(Definition of a determiner (ONE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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