Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Latin
Origin: 'shield of Jupiter, made of goatskin', from Greek aigis 'shield of Zeus', perhaps from aix 'goat'

aegis

 noun
     
ae‧gis formal

under the aegis of somebody/something

with the protection or support of a person or organization:
a refugee camp operating under the aegis of the UN
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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