n. [ Gr. sw^ma, sw`matos, body + pleyra` side. ] (Anat.) The outer, or parietal, one of the two lamellae into which the vertebrate blastoderm divides on either side of the notochord, and from which the walls of the body and the amnion are developed. See Splanchnopleure. [ 1913 Webster ]
a. 1. Having no top, or no visble fop; hence, fig.: very lofty; supreme; unequaled. “ The topless Apennines.” “Topless fortunes.” Beau. & Fl. [ 1913 Webster ]
2. wearing no clothes above the waist, said especially of women. [ PJC ]
3. featuring entertainment by women wearing no clothes above the waist; as, a topless go-go joint. [ PJC ]