Laocoon

n. (Greek Mythology) priest of Apollo during the Trojan war who was killed together with his two sons by two sea snakes for having warned his people of the Trojan horse

For the Hellenistic marble sculpture, see Laocoön and his Sons. Laocoön (Λαοκόων [laok'ooːn], usual English pronunciation [leɪ'ɒkəʊɒn]), the son of Acoetes was a Trojan priest of Poseidon, or of Apollo, whose rules he had defied by marrying and having sons or had committed an impiety by having sex with his wife in the presence of a cult image in a sanctuary; his minor role in the Epic Cycle narrating the Trojan War was of warning the Trojans in vain against accepting the Trojan Horse from the Greeks— "A deadly fraud is this," he said, "devised by the Achaean chiefs!"— and for his subsequent divine execution by serpents sent from the sea.
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Noun
1. (Greek mythology) the priest of Apollo who warned the Trojans to beware of Greeks bearing gifts when they wanted to accept the Trojan Horse; a god who favored the Greeks (Poseidon or Athena) sent snakes who coiled around Laocoon and his two twin sons killing them
(hypernym) mythical being
(classification) Greek mythology

(n.)
A priest of Apollo, during the Trojan war. (See 2.)
  

(n.)
A marble group in the Vatican at Rome, representing the priest Laocoon, with his sons, infolded in the coils of two serpents, as described by Virgil.
  

[Greek heroic] A Trojan priest. He threw a lance at the wooden horse of the Greeks and warned the Trojans about it. The gods had two huge serpents emerge from the ocean, and they tore Laocoon and his two sons apart.