Meaning : Important in effect or meaning.
Example :
A significant change in tax laws.
A significant change in the Constitution.
A significant contribution.
Significant details.
Statistically significant.
Synonyms : important
Meaning : Of considerable importance, size, or worth.
Example :
Won by a substantial margin.
Synonyms : substantial
Meaning : Too closely correlated to be attributed to chance and therefore indicating a systematic relation.
Example :
The interaction effect is significant at the .01 level.
No significant difference was found.
Attributable to chance.
nonsignificant