/ Dictionary / Index P psychasthenia: Meaning and Definition of Find definitions for: psy•chas•the•ni•a Pronunciation: (sī"kus-thē'nē-u), [key] — n. (no longer in technical use) a neurosis marked by fear, anxiety, phobias, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. psych psyche Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language