significant

adj

1. Signifying something; carrying meaning.

   “a significant word or sound”

   “a significant look”

   “It was well said of Plotinus, that the stars were significant, but not efficient.”

   “As evening came on, it grew prematurely dark and cloudy; while the waves acquired that dull indigo tint so significant of ugly weather.”

2. Having a noticeable or major effect.

   “That was a significant step in the right direction.”

   “The First World War was a significant event.”

   “The “little green men”—faces covered, wearing unmarked olive uniforms, speaking Russian and using Russian weapons—have played a significant role in both the occupation of Crimea and the civil war in eastern Ukraine.¹⁹⁶”

3. Reasonably large in number or amount.
4. Having a covert or hidden meaning.
5. Having a low probability of occurring by chance (for example, having high correlation and thus likely to be related).
6. Of a digit or figure, see significant figure.

noun

1. That which has significance; a sign; a token; a symbol.

   “In dumb significants proclaim your thoughts.”

   “And in my glass significants there are”