significant
adjective(sig-nif-i-cant)
rich in significance or implication
Examples:
A significant silence. 
significant
adjective(sig-nif-i-cant)
important in effect or meaning
Examples:
A significant change in tax laws. 
A significant change in the Constitution. 
A significant contribution. 
Significant details. 
Statistically significant. 
significant
adjective(sig-nif-i-cant)
of considerable importance, size, or worth
significant
adjective(sig-nif-i-cant)
too closely correlated to be attributed to chance and therefore indicating a systematic relation
Examples:
The interaction effect is significant at the .01 level. 
No significant difference was found.