What is to cause to move or slide from the land into the water; to set afloat; as, to launch a ship. With stays and cordage last he rigged the ship, And rolled on levers, launched her in the deep. Pope called?

launch — To cause to move or slide from the land into the water; to set afloat; as, to launch a ship. With stays and cordage last he rigged the ship, And rolled on levers, launched her in the deep. Pope. (Webster's 1913.)