/ Dictionary / Index A aegis: Meaning and Definition of Find definitions for: ae•gis Pronunciation: (ē'jis), [key] — n. the shield or breastplate of Zeus or Athena, bearing at its center the head of the Gorgon. protection; support: under the imperial aegis. sponsorship; auspices: a debate under the aegis of the League of Women Voters. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aegis (Thesaurus) aegirite Aegisthus Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language