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English definition of “flimsy”

flimsy

adjective uk   /ˈflɪm.zi/ us  

flimsy adjective (THIN)

very thin, or easily broken or destroyed: You won't be warm enough in that flimsy dress. We spent the night in a flimsy wooden hut. a flimsy cardboard box

flimsy adjective (DIFFICULT TO BELIEVE)

A flimsy argument, excuse, etc. is weak and difficult to believe: When I asked him why he was late, he gave me some flimsy excuse about having car trouble.
flimsily
adverb uk   /-zɪ.li/ us  
flimsiness
noun [U] uk   /-nəs/ us  
(Definition of flimsy from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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SMART Thesaurus: Fragile and breakable

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