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English definition of “on”

on

preposition (CONNECTED)    /ɒn/ US  /ɑːn/
A1 covering the surface of, being held by, or connected to something: You've got blood on your shirt . Which finger do you wear your ring on? Can you stand on your head ? We could hang this picture on the wall next to the door . Dogs should be kept on their leads at all times .UK We've just moved house and we're not on the phone (= not connected to the phone service ) yet .On or off Grammar:At, on and in (place)We use at:Grammar:On, ontoOn and onto are prepositions.
(Definition of on preposition (CONNECTED) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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