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English definition of “significant”

significant

adjective  /sɪɡˈnɪf·ɪ·kənt/ us  
important, large, or great, esp. in leading to a different result or to an important change: This election reaffirms a significant shift of the center of power. Marriage is a significant commitment.
significance
noun [U]  /sɪɡˈnɪf·ɪ·kəns/ us  
The full significance of space exploration 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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