/ Dictionary / Index A aitch: Meaning and Definition of Find definitions for: aitch Pronunciation: (āch), [key] — n. the letter H, h. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ait aitchbone Related Content Daily Word Quiz: pedagogy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language