Entulessë was a ship, which was sailed by the great Númenórean mariner Vëantur, who was Captain of the King's Ships in the time of Tar-Elendil, Númenor's fourth King. After nearly six hundred years, Entulessë was the first Númenórean vessel to make the journey back to Middle-earth across the Great Sea.
According to the histories of Númenor, Vëantur sailed the ship into the harbour of the Grey Havens in the spring of S.A. 600. Gil-galad was still King in Lindon at that time, and Vëantur remained in his land for some months. As the following year turned to autumn, Entulessë set sail once again, beginning the long journey home to Númenor.