crookback n a person whose back is hunched because of abnormal curvature of the upper spine s characteristic of or suffering from kyphosis, an abnormality of the vertebral column Usage(s) The final answer to that question is supplied by Richard III, the "crookback" who murders gentle Henry VI but dies ignominiously at last at the hands of Richmond. One day she read a book about Richard III and mentioned "crookback" to her mother. Synonym(s) humpback hunchback crookbacked humped humpbacked hunchbacked gibbous kyphotic