/ Dictionary / Index H hyperthyroid: Meaning and Definition of Find definitions for: hy•per•thy•roid Pronunciation: (hī"pur-thī'roid), [key] — adj. Pathol. of, pertaining to, or having hyperthyroidism. characterized by extreme intensity, emotionalism, or lack of restraint: hyperthyroid journalism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hyperthymia hyperthyroidism Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language