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English definition of “dos”

dos

noun [plural] uk   /duːz/ us  
dos and don'ts (also do's and don'ts) rules about actions and activities that people should or should not perform or take part in: At my school we had to put up with a lot of dos and don'ts.Rules and laws
(Definition of dos noun from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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