1.Definition: a person whose back is hunched because of abnormal curvature of the upper spine

Related Noun(s):crookback, hunchback

Category: People

2.Definition: an abnormal backward curve to the vertebral column

Related Noun(s):hunchback, kyphosis

Category: General

3.Definition: large whalebone whale with long flippers noted for arching or humping its back as it dives

Category: Animals