Sleep'er, n.

noun

n. 1. One who sleeps; also, a drone, or lazy person.

That which lies dormant, as a law not executed. [Obs.] Bacon.
An animal that lies dormant in winter, as the bear, the marmot, and some others.
A piece of timber or stone, on or near the level of the ground, for the support of some superstructure, as joists, &c., or to steady rails or framework.

☞ The sleepers of a railway, when lying across the road-bed, are called cross-sleepers; and when parallel with the rail, stringers or longitudinals.

(Arch.) A rafter lying in the valley of a roof. [Obs.] Gwilt.
(Naut.) One of the knees which connect the transoms to the after-timbers on the ship's quarter.
(Glass Manuf.) A large iron bar crossing the smaller ones, hindering the passage of coals, but leaving room for the ashes.
(Ichth.) A large acanthopterygious fish of the family Gobiodæ; the species of which are natives of warm climates, living in fresh water, and concealing themselves in the mud; Eleotris dormatrix. Eng. Cyc.