/ Dictionary / Index A astatic: Meaning and Definition of Find definitions for: a•stat•ic Pronunciation: (ā-stat'ik), [key] — adj. unstable; unsteady. having no tendency to take a definite position or direction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: astatic (Thesaurus) astasia astatic galvanometer Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language