n. The property or state of being transparent; that state or property of a body by which it admits of the passage of: rays of light so that forms, colors, and brightness of objects can be seen through it; diaphaneity.n. Something intended to be seen by means of transmitted light, as a picture, a sign, or other representation; often, an announcement of news, painted on canvas or other translucent material and lighted from behind; hence, by extension, a frame or construction, usually of wood and muslin, containing the lights necessary, and having one, two, or four inscriptions, or the like, on different sides.n. In photography, a positive picture on glass, intended to be viewed by transmitted light.n. A translation of the German title Durchlaucht (Seine Durchlaucht, literally ‘His Perlustriousness,’ used like the English His Serene Highness).