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.