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significant (adj.)
1570s, "having a meaning," from Latin significantem (nominative significans, present participle of significare "make known, indicate" (see signify). Earlier in the same sense was significative (c. 1400). Often "having a special or secret meaning," hence "important" (1761). Related: Significantly. Significant figure is from 1680s. Significant other (n.) attested by 1961, in psychology, "the most influential other person in the patient's world."
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Definitions of significant
Dictionary entries near significant
signboard
signee
signer
signet
significance
significant
signification
signifier
signify
sign-in
signor