aegis

UK: /ˈiːdʒɪs/ US: /ˈidʒɪs/ ,(ē′jis)

WordReference Random House Learner's Dictionary of American English © 2025

ae•gis /ˈidʒɪs/   n. 

[uncountable]

Idioms

1. under the aegis of, sponsored or supported by:
   a concert under the aegis of the student government.

WordReference Random House Unabridged Dictionary of American English © 2025

ae•gis  (ē′jis), n. 

1. Mythology [Class. Myth.] the shield or breastplate of Zeus or Athena, bearing at its center the head of the Gorgon.
2. protection;
   support:
   under the imperial aegis.
3. sponsorship;
   auspices:
   a debate under the aegis of the League of Women Voters.
   Also, egis. 

• Greek aigís shield of Zeus or Athena, probably from aig- (stem of aíx goat) + -is noun, nominal suffix, from a type of shield made of goatskin
• Latin
• 1695–1705

Synonyms

• 3. patronage.

Collins Concise English Dictionary © HarperCollins Publishers::

aegis, egis / ˈiːdʒɪs/ noun

1. sponsorship or protection; auspices (esp in the phrase under the aegis of)
2. the shield of Zeus, often represented in art as a goatskin

Etymology: 18th Century: from Latin, from Greek aigis shield of Zeus, perhaps related to aig-, stem of aix goat