"significant" in the adjective sense
1. significant, important
important in effect or meaning
"a significant change in tax laws"
"a significant change in the Constitution"
"a significant contribution"
"significant details"
"statistically significant"
2. significant, substantial
of considerable importance, size, or worth
"won by a substantial margin"
3. significant
too closely correlated to be attributed to chance and therefore indicating a systematic relation
"the interaction effect is significant at the .01 level"
"no significant difference was found"
4. meaning, pregnant, significant
rich in significance or implication
"a meaning look"
"a significant silence"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
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