Source : Webster's Revised Unabridged Dictionary (1913)

Camber \Cam"ber\, n. [Of. cambre bent, curved; akin to F.
   cambrer to vault, to bend, fr. L. camerare to arch over, fr.
   camera vault, arch. See {Chamber}, and cf. {Camerate}.]
   1. (Shipbuilding) An upward convexity of a deck or other
      surface; as, she has a high camber (said of a vessel
      having an unusual convexity of deck).

   2. (Arch.) An upward concavity in the under side of a beam,
      girder, or lintel; also, a slight upward concavity in a
      straight arch. See {Hogback}.

   {Camber arch} (Arch.), an arch whose intrados, though
      apparently straight, has a slightly concave curve upward.
      

   {Camber beam} (Arch.), a beam whose under side has a concave
      curve upward.

Camber \Cam"ber\, v. t. [imp. & p. p. {Cambered}; p. pr. & vb.
   n. {Cambering}.]
   To cut bend to an upward curve; to construct, as a deck, with
   an upward curve.

Camber \Cam"ber\, v. i.
   To curve upward.

Source : WordNet®

camber
     n 1: a slight convexity (as of the surface of a road)
     2: a slope in the turn of a road or track; the outside is
        higher than the inside in order to reduce the effects of
        centrifugal force [syn: {bank}, {cant}]
     3: the alignment of the wheels of a motor vehicle closer
        together at the bottom than at the top
     v : curve upward in the middle