The Collaborative International Dictionary of English v.0.48:

Valet \Val"et\ (v[a^]l"[e^]t or v[a^]l"[asl]; 277), n. [F.
   valet, OF. vallet, varlet, vaslet. See Varlet, and
   Vassal.]
   1. A male waiting servant; a servant who attends on a
      gentleman's person; a body servant.
      [1913 Webster]

   2. (Man.) A kind of goad or stick with a point of iron.
      [1913 Webster]

   Valet de chambre[F.], a body servant, or personal
      attendant.
      [1913 Webster]

WordNet (r) 3.0 (2006):

valet
    n 1: a manservant who acts as a personal attendant to his
         employer; "Jeeves was Bertie Wooster's man" [syn: valet,
         valet de chambre, gentleman, gentleman's gentleman,
         man]
    v 1: serve as a personal attendant to

Moby Thesaurus II by Grady Ward, 1.0:

37 Moby Thesaurus words for "valet":
   administer to, attend, attend on, boy, butler, care for, chauffeur,
   chore, coachman, dance attendance upon, do for, do service to,
   driver, drudge, equerry, gardener, gentleman, gillie, help,
   houseboy, houseman, lackey, look after, lord-in-waiting, maid, man,
   manservant, minister to, pander to, serve, take care of, tend,
   upon, valet de chambre, wait, wait on, work for