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n. Greek Mythology
The son of Thyestes and lover of Clytemnestra. He helped Clytemnestra kill her husband Agamemnon upon Agamemnon's return from the Trojan War.


(Classical Myth & Legend) Greek myth a cousin to and the murderer of Agamemnon, whose wife Clytemnestra he had seduced. He usurped the kingship of Mycenae until Orestes, Agamemnon's son, returned home and killed him


(iˈdʒɪs θəs)

a cousin of Agamemnon who seduced Clytemnestra and was later killed by Orestes.
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Noun1.Aegisthus - (Greek mythology) the seducer of Clytemnestra and murderer of Agamemnon who usurped the throne of Mycenae until Agamemnon's son Orestes returned home and killed him
Greek mythology - the mythology of the ancient Greeks
References in periodicals archive ?
An important mythological hypotext in Doody's novel is provided by the fate of Orestes and Elektra after they have murdered Aigisthos and Klytaimnestra in retaliation for the latter's murder of Agamemnon.
Together with his elder sister Elektra, who is also eager for revenge, Orestes kills his own mother Klytaemnestra and her new husband Aigisthos.
Similarly, other acclaimed villains such as Aigisthos and even Herakles pervert the ethics of the feast by murdering their guests at table (Od.