To throw, as a lance; to dart; to let fly. See whose arm can lanch the surer bolt.

To move, or cause to slide from the land into the water; as, to lanch a ship.

To dart or fly off; to push off; as, to lanch into the wide world; to lanch into a wide field of discussion.

The sliding or movement of a ship from the land into the water, on ways prepared for the purpose.

A kind of boat, longer, lower, and more flat-bottomed than a long boat.