- Noun. 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.
- Noun. Protection, guidance. Usually used as ''‘under the aegis’'' because of its origin as protection of the shield of Athena.
- Noun. Endorsement.
- Noun. Sponsorship.