significant

adjective

1. 1

   fairly large

   won by a substantial margin

2. 2

   rich in significance or implication

   a meaning look

3. 3

   important in effect or meaning

   a significant change in tax laws

   a significant change in the Constitution

4. 4

   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