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English definition of “behind”

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behind

preposition, adverb uk   /bɪˈhaɪnd/ us  
A1 at the back (of): Look behind you! I hung my coat behind the door. Alex led, and I followed along behind. mainly UK As hard as she tried, she always fell behind the other swimmers in the races. figurative I knew that behind (= hidden by) her smile was sadness.
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behind

adverb uk   /bɪˈhaɪnd/ us  

behind adverb (PLACE)

B1 in the place where someone or something was before: I was annoyed to discover that I'd left my bag behind. After the party a few people stayed behind to help clean up.

behind adverb (SLOWER)

C1 slower or later than someone else, or than you should be: The old woman was behind with (= late paying) the rent.

behind

preposition uk   /bɪˈhaɪnd/ us  
C1 responsible for or the cause of: He wondered what was behind his neighbour's sudden friendliness. Marie Curie was the woman behind enormous changes in the science of chemistry.

behind

noun [C] uk   /bɪˈhaɪnd/ informal us  
the part of the body on which a person sits: He tripped and fell on his behind. Why don't you get off your behind (= stand up) and do something!
Synonym
(Definition of behind from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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