The Collaborative International Dictionary of English v.0.48:

Bathe \Bathe\ (b[=a][th]), v. t. [imp. & p. p. Bathed
   (b[=a][th]d); p. pr. & vb. n. Bathing.] [OE. ba[eth]ien,
   AS. ba[eth]ian, fr. b[ae][eth] bath. See 1st Bath, and cf.
   Bay to bathe.]
   1. To wash by immersion, as in a bath; to subject to a bath.
      [1913 Webster]

            Chancing to bathe himself in the River Cydnus.
                                                  --South.
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   2. To lave; to wet. "The lake which bathed the foot of the
      Alban mountain." --T. Arnold.
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   3. To moisten or suffuse with a liquid.
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            And let us bathe our hands in C[ae]sar's blood.
                                                  --Shak.
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   4. To apply water or some liquid medicament to; as, to bathe
      the eye with warm water or with sea water; to bathe one's
      forehead with camphor.
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   5. To surround, or envelop, as water surrounds a person
      immersed. "The rosy shadows bathe me. " --Tennyson. "The
      bright sunshine bathing all the world." --Longfellow.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bathing \Bath"ing\, n.
   Act of taking a bath or baths.
   [1913 Webster]

   Bathing machine, a small room on wheels, to be driven into
      the water, for the convenience of bathers, who undress and
      dress therein.
      [1913 Webster]

WordNet (r) 3.0 (2006):

bathing
    n 1: immersing the body in water or sunshine
    2: the act of washing yourself (or another person) [syn:
       washup, bathing]

Moby Thesaurus II by Grady Ward, 1.0:

69 Moby Thesaurus words for "bathing":
   Australian crawl, Rugby, acrobatics, affusion, agonistics,
   aquaplaning, aquatics, aspergation, aspersion,
   association football, athletics, backstroke, balneation, baptism,
   bath, bathe, bedewing, breaststroke, butterfly, crawl, dampening,
   damping, deluge, dewing, diving, dog paddle, drowning, fin,
   fishtail, flapper, flipper, floating, flooding, gymnastics, hosing,
   hosing down, humidification, immersion, inundation, irrigation,
   laving, moistening, natation, palaestra, rinsing, rugger,
   sidestroke, soccer, sparging, spattering, splashing, splattering,
   sports, spraying, sprinkling, submersion, surfboarding, surfing,
   swashing, swim, swimming, track, track and field, treading water,
   tumbling, wading, watering, waterskiing, wetting