Definition of: significant

(sig·nif′ə·kənt) adjective
1. Having or expressing a meaning; bearing or embodying a meaning.
2. Betokening or standing as a sign for something; having some covert meaning; significative: His manner was significant.
3. Important, as pointing out something weighty; momentous: opposed to insignificant.
4. Math. Having value or the determining or influential value: the significant figures in a number. See synonyms under IMPORTANT.
—noun Something bearing a meaning; specifically, a token or letter. [<L significans, -antis, ppr. of significare make a sign, mean <signum sign + facere do, make]
—sig·nif′i·cant·ly adverb