The Collaborative International Dictionary of English v.0.48:

Spill \Spill\, v. t. [imp. & p. p. Spilt (sp[i^]lt); p. pr. &
   vb. n. Spilling.]
   To cover or decorate with slender pieces of wood, metal,
   ivory, etc.; to inlay. [Obs.] --Spenser.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Spill \Spill\ (sp[i^]l), v. t. [imp. & p. p. Spilled
   (sp[i^]ld), or Spilt (sp[i^]lt); p. pr. & vb. n.
   Spilling.] [OE. spillen, usually, to destroy, AS. spillan,
   spildan, to destroy; akin to Icel. spilla to destroy, Sw.
   spilla to spill, Dan. spilde, LG. & D. spillen to squander,
   OHG. spildan.]
   1. To destroy; to kill; to put an end to. [Obs.]
      [1913 Webster]

            And gave him to the queen, all at her will
            To choose whether she would him save or spill.
                                                  --Chaucer.
      [1913 Webster]

            Greater glory think [it] to save than spill.
                                                  --Spenser.
      [1913 Webster]

   2. To mar; to injure; to deface; hence, to destroy by misuse;
      to waste. [Obs.]
      [1913 Webster]

            They [the colors] disfigure the stuff and spill the
            whole workmanship.                    --Puttenham.
      [1913 Webster]

            Spill not the morning, the quintessence of day, in
            recreations.                          --Fuller.
      [1913 Webster]

   3. To suffer to fall or run out of a vessel; to lose, or
      suffer to be scattered; -- applied to fluids and to
      substances whose particles are small and loose; as, to
      spill water from a pail; to spill quicksilver from a
      vessel; to spill powder from a paper; to spill sand or
      flour.
      [1913 Webster]

   Note: Spill differs from pour in expressing accidental loss,
         -- a loss or waste contrary to purpose.
         [1913 Webster]

   4. To cause to flow out and be lost or wasted; to shed, or
      suffer to be shed, as in battle or in manslaughter; as, a
      man spills another's blood, or his own blood.
      [1913 Webster]

            And to revenge his blood so justly spilt. --Dryden.
      [1913 Webster]

   5. (Naut.) To relieve a sail from the pressure of the wind,
      so that it can be more easily reefed or furled, or to
      lessen the strain.
      [1913 Webster]

   Spilling line (Naut.), a rope used for spilling, or
      dislodging, the wind from the belly of a sail. --Totten.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Spill \Spill\ (sp[i^]l), n. [[root]170. Cf. Spell a splinter.]
   1. A bit of wood split off; a splinter. [Obs. or Prov. Eng.]
      [1913 Webster]

   2. A slender piece of anything. Specifically:
      [1913 Webster]
      (a) A peg or pin for plugging a hole, as in a cask; a
          spile.
          [1913 Webster]
      (b) A metallic rod or pin.
          [1913 Webster]
      (c) A small roll of paper, or slip of wood, used as a
          lamplighter, etc.
          [1913 Webster]
      (d) (Mining) One of the thick laths or poles driven
          horizontally ahead on top of a set of the main
          timbering in advancing a level in loose ground.

   Syn: forepole; spile[4].
        [1913 Webster]

   3. A little sum of money. [Obs.] --Ayliffe.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Spill \Spill\, v. i.
   1. To be destroyed, ruined, or wasted; to come to ruin; to
      perish; to waste. [Obs.]
      [1913 Webster]

            That thou wilt suffer innocents to spill. --Chaucer.
      [1913 Webster]

   2. To be shed; to run over; to fall out, and be lost or
      wasted. "He was so topful of himself, that he let it spill
      on all the company." --I. Watts.
      [1913 Webster]

WordNet (r) 3.0 (2006):

spill
    n 1: liquid that is spilled; "clean up the spills"
    2: a channel that carries excess water over or around a dam or
       other obstruction [syn: spillway, spill, wasteweir]
    3: the act of allowing a fluid to escape [syn: spill,
       spillage, release]
    4: a sudden drop from an upright position; "he had a nasty spill
       on the ice" [syn: spill, tumble, fall]
    v 1: cause or allow (a liquid substance) to run or flow from a
         container; "spill the milk"; "splatter water" [syn:
         spill, slop, splatter]
    2: flow, run or fall out and become lost; "The milk spilled
       across the floor"; "The wine spilled onto the table" [syn:
       spill, run out]
    3: cause or allow (a solid substance) to flow or run out or
       over; "spill the beans all over the table" [syn: spill,
       shed, disgorge]
    4: pour out in drops or small quantities or as if in drops or
       small quantities; "shed tears"; "spill blood"; "God shed His
       grace on Thee" [syn: spill, shed, pour forth]
    5: reveal information; "If you don't oblige me, I'll talk!";
       "The former employee spilled all the details" [syn: spill,
       talk]
    6: reduce the pressure of wind on (a sail)

Moby Thesaurus II by Grady Ward, 1.0:

196 Moby Thesaurus words for "spill":
   Mystik tape, Scotch tape, accident, acknowledge, adhesive tape,
   admit, admit everything, allow, alluvion, alluvium, avow, babble,
   band, bandage, batten, be indiscreet, be unguarded, belt, betray,
   betray a confidence, blab, blabber, blurt, blurt out, brand, bung,
   butane lighter, capsizal, capsize, cascade, cataclysm, cataract,
   cellophane tape, check valve, cigarette lighter, cloth tape, cock,
   come clean, concede, confess, consume, cop a plea, cork, cropper,
   culbute, deluge, dive, dribble, drip, drop, engulf, engulfment,
   exhaust, expend, fall, fascia, faucet, fillet, firebrand, flambeau,
   flint, flint and steel, flood, flop, forced landing, friction tape,
   girdle, give away, grant, header, igniter, inform, inform on,
   inundate, inundation, lath, leak, leakage, let drop, let fall,
   let on, let slip, lid, light, lighter, ligula, ligule, list, lose,
   masking tape, open up, out with it, outpouring, overbrim, overfill,
   overflow, overflowing, overrun, overrunning, overset, overthrow,
   overturn, overwhelm, own, own up, peach, peg, pin, plank,
   plastic tape, plead guilty, plug, plunge, portfire, pour out,
   pour over, pratfall, rat, reveal a secret, revolution, ribband,
   ribbon, run, run over, sea cock, shred, sing, slat, slip, slop,
   slosh, somersault, somerset, sparker, spatter, spend, spigot,
   spike, spile, spill it, spill out, spill over, spill the beans,
   spillage, spit it out, splash, spline, sprawl, spray, squab,
   squeal, stool, stop, stopgap, stopper, stopple, strake, strap,
   strip, strop, stumble, submerge, submersion, subversion, swamp,
   sweep, taenia, talk, tap, tape, tape measure, tapeline, taper,
   tattle, tattle on, tell all, tell on, tell secrets, tell tales,
   tell the truth, the Deluge, the Flood, throw out, ticker tape,
   torch, trip, tumble, turnover, upset, upturn, use up, valve,
   washout, waste, whelm, whelming



The Free On-line Dictionary of Computing (30 December 2018):

register spilling
spill

    (By analogy with spilling the contents of
   an overfull container) When a compiler is performing the
   register allocation phase of generating machine code and there
   are more live variables than the machine has registers and it
   has to transfer or "spill" some variables from registers to
   memory.

   (2014-08-02)