The Collaborative International Dictionary of English v.0.48:

Slaughter \Slaugh"ter\, v. t. [imp. & p. p. Slaughtered; p.
   pr. & vb. n. Slaughtering.]
   1. To visit with great destruction of life; to kill; to slay
      in battle.
      [1913 Webster]

            Your castle is surprised; your wife and babes
            Savagely slaughtered.                 --Shak.
      [1913 Webster]

   2. To butcher; to kill for the market, as beasts.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Slaughter \Slaugh"ter\, n. [OE. slautir, slaughter, slaghter,
   Icel. sl[=a]tr slain flesh, modified by OE. slaught, slaht,
   slaughter, fr. AS. sleaht a stroke, blow; both from the root
   of E. slay. See Slay, v. t., and cf. Onslaught.]
   The act of killing. Specifically:
   (a) The extensive, violent, bloody, or wanton destruction of
       life; carnage.
       [1913 Webster]

             On war and mutual slaughter bent.    --Milton.
       [1913 Webster]
   (b) The act of killing cattle or other beasts for market.
       [1913 Webster]

   Syn: Carnage; massacre; butchery; murder; havoc.
        [1913 Webster]

WordNet (r) 3.0 (2006):

slaughter
    n 1: the killing of animals (as for food)
    2: a sound defeat [syn: thrashing, walloping, debacle,
       drubbing, slaughter, trouncing, whipping]
    3: the savage and excessive killing of many people [syn:
       slaughter, massacre, mass murder, carnage,
       butchery]
    v 1: kill (animals) usually for food consumption; "They
         slaughtered their only goat to survive the winter" [syn:
         butcher, slaughter]
    2: kill a large number of people indiscriminately; "The Hutus
       massacred the Tutsis in Rwanda" [syn: massacre,
       slaughter, mow down]

Moby Thesaurus II by Grady Ward, 1.0:

143 Moby Thesaurus words for "slaughter":
   annihilate, annihilation, assault, attack, bane, barbarize, batter,
   battering, blood, bloodbath, bloodletting, bloodshed, blue ruin,
   braining, breakup, brutalize, burn, butcher, butchering, butchery,
   carnage, carry on, commit carnage, commit genocide,
   commit mass murder, consumption, cut off, cut short, damnation,
   dealing death, decimate, decimation, depopulate, depredation,
   desolation, despoilment, despoliation, destroy, destruction,
   destruction of life, devastation, disintegration, disorderliness,
   disorganization, dispatch, dispose of, disruption, dissolution,
   do away with, end, euthanasia, execution, exterminate,
   extermination, finish, finish off, flow of blood, forcible seizure,
   get rid of, go on, gore, hammer, havoc, hecatomb, holocaust,
   immolation, kill, killing, lapidation, lay waste, laying waste,
   loot, looting, maim, make away with, mangle, martyrdom,
   martyrization, massacre, maul, mercy killing, mug, murder,
   murder wholesale, mutilate, nip, obstreperousness, occision,
   onslaught, perdition, pillage, pillaging, poisoning, put paid to,
   rage, ramp, rampage, rant, rape, ravage, rave, riot, rioting,
   ritual killing, ritual murder, roar, ruin, ruination, sack,
   sacking, sacrifice, savage, shambles, shooting, slaughtering, slay,
   slay en masse, slaying, sow chaos, sowing with salt, spoliation,
   stick, stoning, storm, take off, taking of life, tear, tear around,
   terrorize, to, torture, total, undoing, unruliness, vandalism,
   vandalize, violate, violation, waste, wipe out, wrack,
   wrack and ruin, wreck



U.S. Gazetteer Places (2000):

Slaughter, LA -- U.S. village in Louisiana
   Population (2000):    1011
   Housing Units (2000): 376
   Land area (2000):     5.484612 sq. miles (14.205078 sq. km)
   Water area (2000):    0.008698 sq. miles (0.022529 sq. km)
   Total area (2000):    5.493310 sq. miles (14.227607 sq. km)
   FIPS code:            70770
   Located within:       Louisiana (LA), FIPS 22
   Location:             30.716484 N, 91.144506 W
   ZIP Codes (1990):     70777
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Slaughter, LA
    Slaughter