top·less 
(tŏplĭs)
(tŏplĭs)adj.
1. Having no top: a collection of topless jars.
2.
a. Having no part covering the breasts: a topless bathing suit.
b. Wearing no top: topless dancers.
c. Permitting or featuring public exposure of the breasts: a topless beach; topless bars.
3. So high as to appear to extend out of sight: the topless Alps.