The Collaborative International Dictionary of English v.0.48:

Slat \Slat\, n. [CF. Slot a bar.]
   A thin, narrow strip or bar of wood or metal; as, the slats
   of a window blind.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Slat \Slat\, v. t. [imp. & p. p. Slatted; p. pr. & vb. n.
   Slatting.] [OE. slatten; cf. Icel. sletta to slap, to dab.]
   1. To slap; to strike; to beat; to throw down violently.
      [Prov. Eng. & Colloq. U.S.]
      [1913 Webster]

            How did you kill him?
            Slat[t]ed his brains out.             --Marston.
      [1913 Webster]

   2. To split; to crack. [Prov. Eng.] --Halliwell.
      [1913 Webster]

   3. To set on; to incite. See 3d Slate. [Prov. Eng.]
      [1913 Webster]

WordNet (r) 3.0 (2006):

slat
    n 1: a thin strip (wood or metal) [syn: slat, spline]
    v 1: equip or bar with slats; "Slat the windows"
    2: close the slats of (windows)

Moby Thesaurus II by Grady Ward, 1.0:

153 Moby Thesaurus words for "slat":
   Mystik tape, Scotch tape, adhesive tape, band, bandage, bang,
   batten, beam, belt, billet, board, boarding, bump, burst, bust,
   cellophane tape, clap, clapboard, clash, cloth tape, coat, coating,
   collop, cord, cordwood, covering, crack, crash, crump, cut, deal,
   disk, driftwood, fascia, feuille, fillet, film, firewood, flap,
   flop, foil, fold, friction tape, girdle, gruel, hardwood, knock,
   lamella, lamina, laminated glass, laminated wood, lap, lath,
   lathing, lathwork, leaf, ligula, ligule, list, log, lumber,
   masking tape, membrane, mere shadow, pane, panel, panelboard,
   paneling, panelwork, paper, patina, peel, pellicle, plait, plank,
   planking, plastic tape, plate, plating, ply, plyboard, plywood,
   pole, post, puncheon, rail, rake, rap, rasher, report, ribband,
   ribbon, safety glass, scum, shadow, shake, shaving, sheathing,
   sheathing board, sheet, sheeting, shingle, shred, sideboard,
   siding, skeleton, skin, slab, slam, slap, slice, slip, smack,
   softwood, soup, spill, splat, spline, splinter, stave, stick,
   stick of wood, stovewood, strake, strap, streak, strip, strop,
   swap, table, tablet, taenia, tap, tape, tape measure, tapeline,
   three-by-four, thwack, ticker tape, timber, timbering, timberwork,
   two-by-four, vein, veneer, wafer, weatherboard, whack, wham, whap,
   whomp, whop, wood