significant

1. Important in effect or meaning (synset 302168847)
   "a significant change in tax laws"; "a significant change in the Constitution"; "a significant contribution"; "significant details"; "statistically significant"
   also:

   • important, of import - of great significance or value
   • meaningful - having a meaning or purpose
   tells us about: significance - the quality of being significant
   similar to:

   • momentous - of very great significance
   • epoch-making, epochal - highly significant or important especially bringing about or marking the beginning of a new development or era
   • earthshaking, world-shaking, world-shattering - sufficiently significant to affect the whole world
   • evidential, evidentiary - serving as or based on evidence
   • fundamental, profound - far-reaching and thoroughgoing in effect especially on the nature of something
   • large - fairly large or important in effect; influential
   • monumental - of outstanding significance
   • notable, noteworthy, remarkable - worthy of attention because interesting, significant, or unusual
   • probative, probatory - tending to prove a particular proposition or to persuade you of the truth of an allegation
   • operative - effective; producing a desired effect
   • portentous, prodigious - of momentous or ominous significance
   same as: important
2. Of considerable importance, size, or worth (synset 300627729)
   "won by a substantial margin"
   similar to: considerable - large or relatively large in number or amount or extent or degree
   same as: substantial
3. Too closely correlated to be attributed to chance and therefore indicating a systematic relation (synset 302173212)
   "the interaction effect is significant at the .01 level"; "no significant difference was found"
   referred to in: statistics - a branch of applied mathematics concerned with the collection and interpretation of quantitative data and the use of probability theory to estimate population parameters
4. Rich in significance or implication (synset 301500681)
   "a meaning look"; "a significant silence"
   similar to: meaningful - having a meaning or purpose
   same as: meaning, pregnant

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