markedly different from the usual; "a peculiar hobby of stuffing and mounting bats"; "a man...feels it a peculiar insult to be taunted with cowardice by a woman"-Virginia Woolf
important in effect or meaning; "a significant change in tax laws"; "a significant change in the Constitution"; "a significant contribution"; "significant details"; "statistically 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"