1. Aegisthus - Noun
2. Aegisthus - Proper noun
(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
Source: WordNetAegisthus successfully murdered Atreus and restored his father to the throne. Source: Internet
Aegisthus and his father now took possession of their lawful inheritance from which they had been expelled by Atreus. Source: Internet
Death of Atreus In the night in which Pelopia had been raped by her father, she had taken from him his sword which she afterwards gave to Aegisthus. Source: Internet
In culture Pierre-Narcisse Guérin 's Clytemnestra and Agamemnon, in which Aegisthus appears as a shadowy figure pushing Clytemnestra forward Homer gives no information about Aegisthus' back-story. Source: Internet
He used the Spartan army to drive out Aegisthus and Thyestes from Mycenae and place Agamemnon on the throne. Source: Internet
In order not to be surprised by the return of Agamemnon, he sent out spies, and when Agamemnon came, Aegisthus invited him to a repast at which he had him treacherously murdered. Source: Internet