• An argillaceous rock which readily splits into thin plates; argillite; argillaceous schist. • Any rock or stone having a slaty structure. • A prepared piece of such stone. • A thin, flat piece, for roofing or covering houses, etc. • A tablet for writing upon. • An artificial material, resembling slate, and used for the above purposes. • A thin plate of any material; a flake. • A list of candidates, prepared for nomination or for election; a list of candidates, or a programme of action, devised beforehand. • To cover with slate, or with a substance resembling slate; as, to slate a roof; to slate a globe. • To register (as on a slate and subject to revision), for an appointment. • To set a dog upon; to bait; to slat. See 2d Slat, 3.