from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Protection: a child whose welfare is now under the aegis of the courts.
- n. Sponsorship; patronage: a concert held under the aegis of the parents' association.
- n. Guidance, direction, or control: a music program developed under the aegis of the conductor.
- n. Greek Mythology The goatskin shield or breastplate of Zeus or Athena. Athena's shield carried at its center the head of Medusa.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A mythological shield associated with Zeus and Athena shown as a short cloak consisting of a goatskin. The aegis of Athena is usually shown with a border of snakes and with the head of Medusa in the center. The aegis is more an emblem of protection and power than an actual military shield.
- n. Protection, guidance. Usually used as ‘under the aegis’ because of its origin as protection of the shield of Athena.
- n. Endorsement.
- n. Sponsorship.
Latin, from Greek aigis, goatskin, skin shield, aegis, from aix, aig-, goat.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin aegis, from Ancient Greek αἰγίς (aigis, "goatskin”, “shield of Athena"), from αἴξ (aix, "goat"). (Wiktionary)