/ Dictionary / Index A asthenia: Meaning and Definition of Find definitions for: as•the•ni•a Pronunciation: (as-thē'nē-u), [key] — n. lack or loss of strength; weakness. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: asthenia (Thesaurus) aster yellows asthenic Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language