/ Dictionary / Index A aching: Meaning and Definition of Find definitions for: ach•ing Pronunciation: (ā'king), [key] — adj. causing physical pain or distress: treatment for an aching back. full of or precipitating nostalgia, grief, loneliness, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aching (Thesaurus) Achinese Achinsk Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language