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English definition of “common sense”

common sense

noun [U]    
B1 the basic level of practical knowledge and judgment that we all need to help us live in a reasonable and safe way: Windsurfing is perfectly safe as long as you have/use some common sense. a matter of common senseIntelligencePerceptive commonsensical     /ˌkɒm.ənˈsen.sɪ.kəl/ US  /ˌkɑː.mən-/ adjective He described the report as "rigorous and commonsensical".IntelligencePerceptive
(Definition of common sense noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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