• Any large piece of timber or iron long in proportion to its thickness, and prepared for use. • One of the principal horizontal timbers of a building or ship. • The width of a vessel; as, one vessel is said to have more beam than another. • The bar of a balance, from the ends of which the scales are suspended. • The principal stem or horn of a stag or other deer, which bears the antlers, or branches. • The pole of a carriage. • A cylinder of wood, making part of a loom, on which weavers wind the warp before weaving; also, the cylinder on which the cloth is rolled, as it is woven; one being called the fore beam, the other the back beam. • The straight part or shank of an anchor. • The main part of a plow, to which the handles and colter are secured, and to the end of which are attached the oxen or horses that draw it. • A heavy iron lever having an oscillating motion on a central axis, one end of which is connected with the piston rod from which it receives motion, and the other with the crank of the wheel shaft; -- called also working beam or walking beam. • A ray or collection of parallel rays emitted from the sun or other luminous body; as, a beam of light, or of heat. • Fig.: A ray; a gleam; as, a beam of comfort. • One of the long feathers in the wing of a hawk; -- called also beam feather. • To send forth; to emit; -- followed ordinarily by forth; as, to beam forth light. • To emit beams of light.