significant

[sig-nif-i-kuhnt]
adjective
1.
important; of consequence.
2.
having or expressing a meaning; indicative; suggestive: a significant wink.
3.
Statistics. of or pertaining to observations that are unlikely to occur by chance and that therefore indicate a systematic cause.
noun
4.
something significant; a sign.

Origin:
1570–80; < Latin significant- (stem of significāns), present participle of significāre to signify; see -ant

significantly, adverb
nonsignificant, adjective
nonsignificantly, adverb
supersignificant, adjective
supersignificantly, adverb
unsignificant, adjective
unsignificantly, adverb


1. consequential, momentous, weighty. 2. See expressive.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
significant (sɪɡˈnɪfɪkənt)
 
adj
1.  having or expressing a meaning; indicative
2.  having a covert or implied meaning; suggestive
3.  important, notable, or momentous
4.  statistics of or relating to a difference between a result derived from a hypothesis and its observed value that is too large to be attributed to chance and that therefore tends to refute the hypothesis
 
[C16: from Latin significāre to signify]
 
sig'nificantly
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

significant
1570s, from L. significant-, stem of significans, prp. of significare (see signify).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Yet even this was so significant of current thought, and helped so greatly to
  form public opinion, that it must not be forgotten.
Wherever it is prominent it contains the hallucinatory reproduction of a memory
  which was significant for the hysterical onset.
He chooses his characters because they embody concretely and so exemplify the
  conception he has formed of a significant situation.
Every sentence is doubly significant, and the sense of our author is as broad
  as the world.
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