Having or expressing a meaning: Are the markings on the stone significant? Having or expressing a covert or nonverbal meaning; suggestive: a significant glance.
Having or likely to have a major effect; important: a significant change in the tax laws.
Fairly large in amount or quantity: significant casualties; no significant opposition.
Statistics Of or relating to observations or occurrences that are too closely correlated to be attributed to chance and therefore indicate a systematic relationship.