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English definition of “on”

on

preposition (FOOD/FUEL/DRUG)    /ɒn/ US  /ɑːn/
B2 used to show something that is used as food, fuel, or a drug: What do mice live on? Does this radio run on batteries? Is he on drugs?Drug addictionAddictionEatingBiting, chewing and swallowingFuelsPetroleum products especially when used as fuel Grammar:On, ontoOn and onto are prepositions.See more
(Definition of on preposition (FOOD/FUEL/DRUG) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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