GNU Collaborative International Dictionary of English

Found one definition

1.       
   Bas-relief , n. [F. bas-relief; bas low + relief raised work, relever to raise: cf. It. bassorilievo.] Low relief; sculpture, the figures of which project less than half of their true proportions; -- called also bass-relief and basso-rilievo. See Alto-rilievo.
   1913 Webster