/ Dictionary / Index A ailing: Meaning and Definition of Find definitions for: ail•ing Pronunciation: (ā'ling), [key] — adj. sickly; unwell. unsound or troubled: a financially ailing corporation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ailing (Thesaurus) Ailey ailment Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language