/ Dictionary / Index A ail: Meaning and Definition of Find definitions for: ail Pronunciation: (āl), [key] — v.t. to cause pain, uneasiness, or trouble to. —v.i. to be unwell; feel pain; be ill: He's been ailing for some time. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ail (Thesaurus) aikido ailanthus Related Content Daily Word Quiz: miscreant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language