[1] : The Collaborative International Dictionary of English v.0.48

sloth \sloth\, n. oe. slouthe, sleuthe, as. sl?w?, fr. sl=aw
   slow. see slow.
   1. slowness; tardiness.
      1913 webster

            these cardinals trifle with me; i abhor
            this dilatory sloth and tricks of rome. --shak.
      1913 webster

   2. disinclination to action or labor; sluggishness; laziness;
      idleness.
      1913 webster

            they change their course to pleasure, ease, and
            sloth.                                --milton.
      1913 webster

            sloth, like rust, consumes faster than labor wears.
                                                  --franklin.
      1913 webster

   3. zool. any one of several species of arboreal edentates
      constituting the family bradypodidae, and the suborder
      tardigrada. they have long exserted limbs and long
      prehensile claws. both jaws are furnished with teeth see
      illust. of edentata, and the ears and tail are
      rudimentary. they inhabit south and central america and
      mexico.
      1913 webster

   note: the three-toed sloths belong to the genera bradypus
         and arctopithecus, of which several species have been
         described. they have three toes on each foot. the
         best-known species are collared sloth bradypus
         tridactylus, and the ai arctopitheus ai. the
         two-toed sloths, consisting the genus cholopus, have
         two toes on each fore foot and three on each hind foot.
         the best-known is the unau cholopus didactylus of
         south america. see unau. another species cholopus
         hoffmanni inhabits central america.
         various large extinct terrestrial edentates, such as
         megatherium and mylodon, are often called sloths.
         1913 webster

   australian sloth, or native sloth zool., the koala.

   sloth animalcule zool., a tardigrade.

   sloth bear zool., a black or brown long-haired bear
      melursus ursinus, or melursus labiatus, native of
      india and ceylon; -- called also aswail, labiated
      bear, and jungle bear. it is easily tamed and can be
      taught many tricks.

   sloth monkey zool., a loris.
      1913 webster
see also:
slow bradypodidae edentata bradypus arctopithecus bradypus tridactylus 
arctopitheus ai cholopus cholopus didactylus unau cholopus hoffmanni 
australian sloth native sloth sloth animalcule sloth bear melursus ursinus 
melursus labiatus aswail labiated bear jungle bear sloth monkey 

[2] : The Collaborative International Dictionary of English v.0.48

sloth \sloth\, v. i.
   to be idle. obs. --gower.
   1913 webster

[3] : WordNet (r) 2.0

sloth
     n 1: a disinclination to work or exert yourself syn: slothfulness
     2: any of several slow-moving arboreal mammals of south america
        and central america; they hang from branches back downward
        and feed on leaves and fruits syn: tree sloth
     3: apathy and inactivity in the practice of virtue personified
        as one of the deadly sins syn: laziness, acedia
see also:
slothfulness tree sloth laziness acedia 

[4] : Moby Thesaurus II by Grady Ward, 1.0

185 moby thesaurus words for "sloth":
   chiroptera, lagomorpha, primates, rodentia, accidia, acedia,
   aloofness, anger, apathy, army, ataraxia, ataraxy, avarice,
   avaritia, benumbedness, blah, blahs, boredom, bunch, carelessness,
   casualness, cautiousness, cave of trophonius, cave of despair,
   circumspection, colony, comatoseness, creeping, deadly sin,
   deliberateness, deliberation, despair, desperateness, desperation,
   despondency, detachment, dilatoriness, disconsolateness,
   disinterest, dispassion, disregard, disregardfulness,
   do-nothingness, drawl, drift, drive, drove, drowsiness, dullness,
   easygoingness, enervation, ennui, envy, ergophobia, faineancy,
   faineantise, fatigue, flock, foot-dragging, forlornness, gam, gang,
   gluttony, greed, gula, heartlessness, heaviness, hebetude,
   heedlessness, herd, hoboism, hopelessness, host, idleness, idling,
   inanimation, inappetence, inattention, inattentiveness,
   incuriosity, indifference, indiscrimination, indolence, inertia,
   inertness, inexcitability, inexertion, insouciance, invidia, ira,
   jadedness, just being, kennel, lack of affect, lack of appetite,
   lackadaisicalness, laggardness, languidness, languishment, languor,
   languorousness, lassitude, laze, laziness, lazing, leisureliness,
   lenitude, lentitude, lentor, lethargicalness, lethargy,
   lifelessness, listlessness, litter, loafing, lotus-eating, lust,
   luxuria, mere existence, mere tropism, mindlessness, negligence,
   no exit, no way, no way out, nonchalance, numbness, oscitancy,
   pack, passiveness, passivity, phlegm, phlegmaticalness,
   phlegmaticness, plucklessness, pococurantism, pod, pokiness, pride,
   recklessness, regardlessness, reluctance, remissness, resignation,
   resignedness, satedness, school, shiftlessness, shoal, skulk,
   slackness, sleepiness, slothfulness, slouch, slowness, sluggardy,
   sluggishness, somnolence, sopor, soporifousness, spiritlessness,
   spring fever, spunklessness, stagnation, stupefaction, stupor,
   superbia, supineness, tentativeness, torpidity, torpidness,
   torpitude, torpor, trip, troop, unanxiousness, unconcern,
   unmindfulness, unsolicitousness, vagrancy, vegetation, weariness,
   withdrawnness, world-weariness, wrath

Sloth >> S Words
Sloth, definition of term: Sloth
sloth_pag1.html

Sloth Bear >> S Words
Sloth Bear, definition of term: Sloth Bear
sloth+bear_pag1.html

Two-Toed Sloth >> T Words
Two-Toed Sloth, definition of term: Two-Toed Sloth
two-toed+sloth_pag1.html