con·voy / ˈkänˌvoi/ • n. a group of ships or vehicles traveling together, typically accompanied by armed troops, warships, or other vehicles for protection.• v. / ˈkänˌvoi; kənˈvoi/ [tr.] (of a warship or armed troops) accompany (a group of ships or vehicles) for protection.PHRASES: in convoy (of traveling vehicles) as a group; together.

Convoy

a party of ships escorting unarmed vessels; a wedding party or funeral train or cortège; a supply of provisions.

Examples: convoy of friends, 1596; of honour, 1866; of meat and drink, 1691; of rude men, 1681; of mourners, 1523; of mules, 1827; of provisions, 1839; of ships, 1626; of wedding guests.

convoy accompany, escort XIV; †convey, conduct XV. — (O)F. convoyer CONVEY.
So as sb. XVI.