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on

preposition (ABOVE)
 
 
/ɒn/ US  /ɑːn/

Definition

A1 used to show that something is in a position above something else and touching it, or that something is moving into such a position: Look at all the books on your desk! Ow, you're standing on my foot! Your suitcase is on top of the wardrobe. They live in that old farmhouse on the hill. I got on my bike and left.On or off
(Definition of on preposition (ABOVE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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