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.