The DICT Development Group

  Visor \Vis"or\, n. [OE. visere, F. visi[`e]re, fr. OF. vis. See
     Visage, Vision.] [Written also visar, visard,
     vizard, and vizor.]
     1. A part of a helmet, arranged so as to lift or open, and so
        show the face. The openings for seeing and breathing are
        generally in it.
        [1913 Webster]
  
     2. A mask used to disfigure or disguise. "My very visor began
        to assume life." --Shak.
        [1913 Webster]
  
              My weaker government since, makes you pull off the
              visor.                                --Sir P.
                                                    Sidney.
        [1913 Webster]
  
     3. The fore piece of a cap, projecting over, and protecting
        the eyes.
        [1913 Webster]

  visor
      n 1: a piece of armor plate (with eye slits) fixed or hinged to
           a medieval helmet to protect the face [syn: visor,
           vizor]
      2: a brim that projects to the front to shade the eyes; "he
         pulled down the bill of his cap and trudged ahead" [syn:
         bill, peak, eyeshade, visor, vizor]

  24 Moby Thesaurus words for "visor":
     bill, camouflage, dark glasses, disguise, domino, eyeshade,
     eyeshield, false colors, false face, false front, goggles,
     incognito, mask, masque, masquerade, mummery, peak,
     protective coloration, shades, smoke screen, smoked glasses,
     sunglasses, vizard, vizard mask