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English definition of “on”

on

adverb (CONNECTED)    /ɒn/ US  /ɑːn/
A2 on your body or someone's body: It's very cold so put a jumper on. She wanders round the house with nothing on. Can you remember what he had on (= was wearing)? I tried on a few jackets, but none of them looked nice.On or off covering the surface of something or connected to something: Screw the lid on tightly. Make sure the top's on properly. Surgeons managed to sew the finger back on.On or off Grammar:On, ontoOn and onto are prepositions.See more
(Definition of on adverb (CONNECTED) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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