The Collaborative International Dictionary of English v.0.48:

Slot \Slot\, v. t. [See Slot a bar.]
   To shut with violence; to slam; as, to slot a door. [Obs. or
   Prov. Eng.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Slot \Slot\, n. [Cf. Icel. sl??, and E. sleuth.]
   The track of a deer; hence, a track of any kind. --Milton.
   [1913 Webster]

         As a bloodhound follows the slot of a hurt deer. --Sir
                                                  W. Scott.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Slot \Slot\, n. [LG. & D. slot a lock, from a verb meaning to
   close., to shut, D. sluiten; akin to G. schliessen, OHG.
   sliozan, OFries. sl?ta, and probably to L. claudere. Cf.
   Close, Sluice.]
   1. A broad, flat, wooden bar; a slat or sloat.
      [1913 Webster]

   2. A bolt or bar for fastening a door. [Prov. Eng.]
      [1913 Webster]

   3. A narrow depression, perforation, or aperture; esp., one
      for the reception of a piece fitting or sliding in it.
      [1913 Webster]

WordNet (r) 3.0 (2006):

slot
    n 1: a position in a grammatical linguistic construction in
         which a variety of alternative units are interchangeable;
         "he developed a version of slot grammar"
    2: a small slit (as for inserting a coin or depositing mail);
       "he put a quarter in the slot"
    3: a time assigned on a schedule or agenda; "the TV program has
       a new time slot"; "an aircraft landing slot" [syn: time
       slot, slot]
    4: a position in a hierarchy or organization; "Bob Dylan
       occupied the top slot for several weeks"; "she beat some
       tough competition for the number one slot"
    5: the trail of an animal (especially a deer); "he followed the
       deer's slot over the soft turf to the edge of the trees"
    6: (computer) a socket in a microcomputer that will accept a
       plug-in circuit board; "the PC had three slots for additional
       memory" [syn: slot, expansion slot]
    7: a slot machine that is used for gambling; "they spend hours
       and hours just playing the slots" [syn: slot, one-armed
       bandit]
    v 1: assign a time slot; "slot a television program"

Moby Thesaurus II by Grady Ward, 1.0:

150 Moby Thesaurus words for "slot":
   IC analysis, abysm, abyss, aperture, appositive, arroyo, assign,
   assignment, attribute, attributive, box canyon, breach, break,
   broaching, canyon, cavity, channel, chap, chasm, check, chimney,
   chink, clearing, cleave, cleft, cleuch, clough, col, complement,
   construction modifier, coulee, couloir, crack, cranny, crevasse,
   crevice, cut, cut apart, cutting, cwm, deep structure, defile,
   dell, depression, dike, direct object, disclosure, ditch, donga,
   draw, excavation, fault, fenestra, filler, fissure, fistula, fit,
   flaw, flume, fontanel, foramen, form-function unit, fracture,
   function, furrow, gap, gape, gash, gat, gorge, groove, gulch, gulf,
   gully, hiatus, hole, hollow, hollow out,
   immediate constituent analysis, incise, incision, indirect object,
   inlet, interval, job, joint, kloof, lacuna, laying open, leak,
   levels, moat, modifier, niche, notch, nullah, object, open,
   opening, opening up, orifice, outlet, pass, passage, passageway,
   phrase structure, place, pore, position, predicate, qualifier,
   ranks, ravine, rent, rift, rime, rive, rupture, schedule, scissure,
   seam, shallow structure, slit, slot and filler, space, split, spot,
   stoma, strata, structure, subject, sulcus, surface structure,
   syntactic analysis, syntactic structure, syntactics, syntax,
   tagmeme, throwing open, trench, uncorking, underlying structure,
   unstopping, vacancy, valley, void, wadi, word arrangement,
   word order, yawn