Wiktionary
bas relief
a. Refers to any aspect of sculpture which is flat or in the bas relief style. n. (context sculpture English) A low or mostly-flat sculpture which is carved into a wall, or is in the form of a tile mounted flat to a wall, rather than a fully three-dimensional, free-standing figure.
WordNet
bas relief
n. a sculptural relief in which forms extend only slightly from the background; no figures are undercut [syn: low relief, basso relievo, basso rilievo] [ant: alto relievo]