Pronunciation: (kum'bak"),[key] —n. 1. a return to a former higher rank, popularity, position, prosperity, etc.: The ex-champion kept trying to make a comeback. 2. a clever or effective retort; rejoinder; riposte: That was a great comeback the comedian made to the hecklers. 3. Informal.a basis or cause of complaint: If you insist on buying these pointed shoes, you'll have no comeback when your toes start to hurt.