/ Dictionary / Index H hyperthymia: Meaning and Definition of Find definitions for: hy•per•thy•mi•a Pronunciation: (hī"pur-thī'mē-u), [key] — n. Psychiatry. a condition characterized by extreme overactivity. exaggerated emotionalism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hyperthermia hyperthyroid Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language