/ Dictionary / Index A axilla: Meaning and Definition of Find definitions for: ax•il•la Pronunciation: (ak-sil'u), [key] — pl. ax•il•lae the armpit. the corresponding region under the wing of a bird. an axil. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: axilla (Thesaurus) axilemma axillar Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language