variants:
or less commonly egis
Definition of aegis
1 : a shield or breastplate emblematic of majesty that was associated with Zeus and Athena
2a : protection under the aegis of the Constitution
b : controlling or conditioning (see condition entry 2 sense 5a) influence
passed new laws under the aegis of national security
3a : auspices, sponsorship under the aegis of the museum
b : control or guidance especially by an individual, group, or system
under the aegis of the government
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Time Traveler for aegis
The first known use of aegis was in the 15th century
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