An Etymological Dictionary of Astronomy and Astrophysics

1. The state or quality of being significant; → meaning; importance.
   

2. Statistics: An estimated measure of the degree to which a result is not merely a matter of chance. See also → significance level, → significance testing.

Etymology (EN): From L. significantia “meaning, force, energy,” from significans, present participle of significare, → signify.

Etymology (PE): Nešânâri, noun from nešânâr, → significant.