significant significant /sɪgˈnɪfɪkənt/

adjective

1. () Important in effect or meaning  ( important , significant )
   important in effect or meaning
    A significant change in tax laws
   a significant change in tax laws
    A significant change in the Constitution
   a significant change in the Constitution
    A significant contribution
   a significant contribution
    Significant details
   significant details
    Statistically significant
   statistically significant
   
2. () Of considerable importance, size, or worth  ( significant , substantial )
   of considerable importance, size, or worth
    Won by a substantial margin
   won by a substantial margin
   
3. () (statistics) too closely correlated to be attributed to chance and therefore indicating a systematic relation  ( significant )
   (statistics) too closely correlated to be attributed to chance and therefore indicating a systematic relation
    The interaction effect is significant at the .01 level
   the interaction effect is significant at the .01 level
    No significant difference was found
   no significant difference was found
   
4. () Rich in significance or implication  ( meaning , pregnant , significant )
   rich in significance or implication
    A meaning look
   a meaning look
    A significant silence
   a significant silence