SIGNIFICANT
significant, substantial
(adjective) of considerable importance, size, or worth; “won by a substantial margin”
pregnant, meaning(a), significant
(adjective) rich in significance or implication; “a meaning look”; “a significant silence”
significant, important
(adjective) important in effect or meaning; “a significant change in tax laws”; “a significant change in the Constitution”; “a significant contribution”; “significant details”; “statistically significant”
significant
(adjective) too closely correlated to be attributed to chance and therefore indicating a systematic relation; “the interaction effect is significant at the .01 level”; “no significant difference was found”
Source: WordNet® 3.1
Etymology
Adjective
significant (comparative more significant, superlative most significant)
Signifying something; carrying meaning.
Having a covert or hidden meaning.
Having a noticeable or major effect; notable.
Reasonably large in number or amount.
(statistics) Having a low probability of occurring by chance (for example, having high correlation and thus likely to be related).
Usage notes
• This word may be ambiguous in some situations. In formal writing, care should be taken with comments such as "the difference is significant," because it is not clear without contextual clues whether significant modifies the fact that there is a difference ("notable"), or the difference itself ("large in number or amount"). In some such situations, large and other synonyms may be used in its place.
Synonyms
• important
Antonyms
• insignificant
• ignorable
• negligible
• slight
Noun
significant (plural significants)
That which has significance; a sign; a token; a symbol.
Source: Wiktionary
Sig*nif"i*cant, a. Etym: [L. significans, -antis, p. pr. of
significare. See Signify.]
1. Fitted or designed to signify or make known somethingl having a
meaning; standing as a sign or token; expressive or suggestive; as, a
significant word or sound; a significant look.
It was well said of Plotinus, that the stars were significant, but
not efficient. Sir W. Raleigh.
2. Deserving to be considered; important; momentous; as, a
significant event. Significant figures (Arith.), the figures which
remain to any number, or decimal fraction, after the ciphers at the
right or left are canceled. Thus, the significant figures of 25,000,
or of .0025, are 25.
Sig*nif"i*cant, n.
Definition: That which has significance; a sign; a token; a symbol.
Wordsworth.
In dumb significants proclaim your thoughts. Shak.
Source: Webster’s Unabridged Dictionary 1913 Edition