Protection, sponsorship, or support, especially from a powerful person or organization; patronage or guidance.
From Greek 'aigis,' the shield or breastplate of Zeus and Athena in mythology, often depicted with the head of Medusa. The word entered English in the 18th century, extending from divine protection to any form of powerful sponsorship or backing.
Think of aegis as 'age-is'—like saying 'this age is under protection!' Zeus's shield was so powerful it could terrify enemies just by being shown. Today, being under someone's aegis means having their powerful protection and support.
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