• A small shoot or branch; a twig. • A collective body of small branches; as, the tree has a beautiful spray. • A side channel or branch of the runner of a flask, made to distribute the metal in all parts of the mold. • A group of castings made in the same mold and connected by sprues formed in the runner and its branches. • Water flying in small drops or particles, as by the force of wind, or the dashing of waves, or from a waterfall, and the like. • A jet of fine medicated vapor, used either as an application to a diseased part or to charge the air of a room with a disinfectant or a deodorizer. • An instrument for applying such a spray; an atomizer. • To let fall in the form of spray. • To throw spray upon; to treat with a liquid in the form of spray; as, to spray a wound, or a surgical instrument, with carbolic acid.