All 7 Uses of

envoy
in
The Iliad by Homer - (translated by: Butler)

Ulysses once came here as envoy about yourself, and Menelaus with him.†
Book 3 *

envoy = representative sent on a mission

When they had got as far the deep-meadowed and rush-grown banks of the Aesopus, the Achaeans sent Tydeus as their envoy, and he found the Cadmeans gathered in great numbers to a banquet in the house of Eteocles.†
Book 4

When he went all unattended as envoy to the city of Thebes among the Cadmeans, I bade him feast in their houses and be at peace; but with that high spirit which was ever present with him, he challenged the youth of the Cadmeans, and at once beat them in all that he attempted, so mightily did I help him.†
Book 5

Men-servants poured water over the hands of the guests, while pages filled the mixing-bowls with wine and water, and handed it round after giving every man his drink-offering; then, when they had made their offerings, and had drunk each as much as he was minded, the envoys set out from the tent of Agamemnon son of Atreus; and Nestor, looking first to one and then to another, but most especially at Ulysses, was instant with them that they should prevail with the noble son of Peleus.†
Book 9

envoys = representatives sent on a mission

When the envoys reached the tents of the son of Atreus, the Achaeans rose, pledged them in cups of gold, and began to question them.†
Book 9

Then Diomed of the loud war-cry also prayed: "Hear me too," said he, "daughter of Jove, unweariable; be with me even as you were with my noble father Tydeus when he went to Thebes as envoy sent by the Achaeans.†
Book 10

envoy = representative sent on a mission

"If," said Agamemnon, "you are sons of Antimachus, who once at a council of Trojans proposed that Menelaus and Ulysses, who had come to you as envoys, should be killed and not suffered to return, you shall now pay for the foul iniquity of your father."†
Book 11

envoys = representatives sent on a mission

Definitions:

(1) (envoy)
a representative sent on a mission -- often representing a government
(2) (meaning too rare to warrant focus)
meaning too rare to warrant focus:

Much more rarely, envoy can reference a specific level of minister in the UK or a brief stanza concluding certain forms of poetry.