/ Dictionary / Index N neurasthenia: Meaning and Definition of Find definitions for: neur•as•the•ni•a Pronunciation: (noor"us-thē'nē-u, nyoor"-), [key] — n. (not in technical use) nervous debility and exhaustion occurring in the absence of objective causes or lesions; nervous exhaustion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: neurasthenia (Thesaurus) neural tube defect neurasthenic Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language