significant Meaning in the Cambridge English Dictionary
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Meaning of “significant” in the English Dictionary

"significant" in British English

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uk   us   /sɪɡˈnɪf.ɪ.kənt/

significant adjective (IMPORTANT)

B2 important or ​noticeable: There has been a significant ​increase in the ​number of women ​students in ​recentyears. The ​talks between the USA and the USSR were very significant for the ​relationship between the two ​countries.
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significant adjective (SPECIAL MEANING)

having a ​specialmeaning: 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 ​letteryet?
(Definition of significant from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"significant" in American English

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 us   /sɪɡˈnɪf·ɪ·kənt/
important, ​large, or ​great, esp. in ​leading to a different ​result or to an ​importantchange: This ​electionreaffirms a significant ​shift of the ​center of ​power. Marriage is a significant ​commitment.
noun [U]  us   /sɪɡˈnɪf·ɪ·kəns/
The ​full significance of ​spaceexploration may not be ​understood for many ​years to come.
(Definition of significant from the Cambridge Academic Content Dictionary © Cambridge University Press)
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