Source : Webster's Revised Unabridged Dictionary (1913)

Hunchback \Hunch"back`\, n. [Cf. {Humpback}.]
   A back with a hunch or hump; also, a hunchbacked person.

Source : WordNet®

hunchback
     adj : characteristic of or suffering from kyphosis, an abnormality
           of the vertebral column [syn: {crookback}, {crookbacked},
            {humped}, {humpbacked}, {hunchbacked}, {gibbous}, {kyphotic}]

hunchback
     n 1: an abnormal backward curve to the vertebral column [syn: {kyphosis},
           {humpback}]
     2: a person whose back is hunched because of abnormal curvature
        of the upper spine [syn: {humpback}, {crookback}]