/ Dictionary / Index H hypersensitive: Meaning and Definition of Find definitions for: hy•per•sen•si•tive Pronunciation: (hī"pur-sen'si-tiv), [key] — adj. excessively sensitive: to be hypersensitive to criticism. allergic to a substance to which persons do not normally react. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hypersensitive (Thesaurus) hypersecretion hypersensitize Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language