Toplessness refers to the state in which a woman's breasts, including her areolas and nipples, are exposed, especially in a public place or in a visual medium. The male equivalent is known as barechestedness.
Exposed breasts are normal in many indigenous societies. However, western countries have social norms around female modesty, often enforced by legal statutes, that require women to cover their breasts in public. In many jurisdictions, women who expose their breasts can be prosecuted for indecent exposure, although public breastfeeding is often exempted from public indecency laws.
Social norms around toplessness vary by context and location. Throughout history, women's breasts have been featured in art and visual media, from painting and sculpture to film and photography, and such representations are generally defended on the grounds of artistic merit. Toplessness may also be deemed acceptable on educational, medical, or political grounds. At many beaches and resort destinations, especially in Europe and Australia, women are either formally or informally permitted to sunbathe topless. However, societies tend to view breast exposure unfavorably, and subject it to stringent regulations or prohibitions.
The word "topless" usually refers to a woman who is naked above her waist or hips or, at least, whose breasts are exposed to public view, specifically including her areolas and nipples. It can describe a woman who appears, poses, or performs with at least her breasts exposed, such as a "topless model" or "topless dancer", or to an activity undertaken while not wearing a top, such as "topless sunbathing". It may indicate a designated location where one might expect to find women not wearing tops, such as a "topless beach" or "topless bar". It can also be used to describe a garment that is specifically designed to reveal the breasts, such as the "topless swimsuit" (also known as the monokini) designed by Rudi Gernreich in the 1960s.
The word "topless" may carry sexual or exhibitionist connotations.