/ Dictionary / Index H headachy: Meaning and Definition of Find definitions for: head•ach•y Pronunciation: (hed'ā"kē), [key] — adj. having a headache. accompanied by or causing headaches: a headachy cold. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. headache head-and-tail light Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language