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English definition of “on”

on

preposition (PAIN)    /ɒn/ US  /ɑːn/
B2 used to show what causes pain or injury as a result of being touched: I hit my head on the shelf as I was standing up. You'll cut yourself on that knife if you're not careful.Through, across, opposite and against Grammar:On, ontoOn and onto are prepositions.See more
(Definition of on preposition (PAIN) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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