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English definition of “regulation”

regulation

adjective     /ˌreɡ.jʊˈleɪ.ʃən/
according to the rules or the usual way of doing things: businessmen in their regulation pinstripe suits It's regulation to wear suits at the office. a regulation football pitchHabitual and customary
(Definition of regulation adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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