aegis

noun

ae·​gis ˈē-jəs How to pronounce aegis (audio)
also
ˈā- How to pronounce aegis (audio)
variants or less commonly
1
: a shield or breastplate emblematic of majesty that was associated with Zeus and Athena
2
a
: 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
3
a
: 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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Aegis Has Greek and Latin Roots

English borrowed aegis from Latin, but the word ultimately comes from the Greek noun aigís, meaning “goatskin.” In ancient Greek mythology, an aegis was something that offered physical protection. It has been depicted in various ways, including as a magical protective cloak made from the skin of the goat that suckled Zeus as an infant, and as a shield fashioned by Hephaestus that bore the severed head of the Gorgon Medusa. The word first entered English in the 15th century as a noun referring to the shield or breastplate associated with Zeus or Athena. It later took on a more general sense of “protection” and, by the late-19th century, it had acquired the extended senses of “auspices” and “sponsorship.”

Examples of aegis in a Sentence

having no claim to the land under the aegis of the law, the cattle baron decided to claim it by force a medical study that was questioned by many because it was done under the aegis of a major pharmaceutical company
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Oscar Mayer’s sports-content maneuver comes under the aegis of Todd Kaplan, who joined Kraft Heinz as its chief marketing officer in July of 2024. Brian Steinberg, Variety, 20 May 2025 While the office is under the aegis of the interior ministry, which is responsible for domestic security, it is designed to operate independently from the government, to insulate it from the political pressures that the AfD alleges were behind the decision. Christopher F. Schuetze, New York Times, 2 May 2025 Previously known as Tallinn Film Wonderland, the filming hub, under the aegis of the Estonian Film Institute, will begin construction in late 2025. Annika Pham, Variety, 17 May 2025 The fact that Canada would come directly under the aegis of the secretary of state suggests that the Trump administration sees the whole of the Western Hemisphere as its own. Margaret MacMillan, The Atlantic, 30 Apr. 2025 See All Example Sentences for aegis

Word History

Etymology

borrowed from Latin, borrowed from Greek aigís "goatskin, mantle of Zeus," derivative of aig-, aíx "goat"; akin to Armenian aic "goat" (perhaps going back to Indo-European *h2eiǵ-ih2-), and perhaps to Avestan izaēna "of leather"

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of aegis was in the 15th century

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Cite this Entry

“Aegis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/aegis. Accessed 4 Jun. 2025.

Kids Definition

aegis

noun
ae·​gis ˈē-jəs How to pronounce aegis (audio)
1
: protection sense 1a, defense
under the aegis of the law
2
: patronage sense 1, sponsorship
under the aegis of the museum

More from Merriam-Webster on aegis

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