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English definition of “petty”

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petty

adjective uk   /ˈpet.i/ us    /ˈpet̬-/ disapproving
C2 [before noun] not important and not worth giving attention to: Prisoners complain that they are subjected to too many petty rules and restrictions. [after noun] complaining too much about things that are not important: Don't be so petty!
pettiness
noun [U] uk   /-nəs/ us  
It was the pettiness of their arguments that irritated her.
(Definition of petty from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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