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English definition of “significant”

significant

adjective uk   /sɪɡˈnɪf.ɪ.kənt/ us  

significant adjective (IMPORTANT)

B2 important or noticeable: There has been a significant increase in the number of women students in recent years. The talks between the USA and the USSR were very significant for the relationship between the two countries.

significant adjective (SPECIAL MEANING)

having a special meaning: She looked at him across the table and gave him a significant smile. Do you think it's significant that he hasn't replied to my letter yet?
(Definition of significant from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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