- trilogy
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/tril"euh jee/, n., pl. trilogies.1. a series or group of three plays, novels, operas, etc., that, although individually complete, are closely related in theme, sequence, or the like.2. (in ancient Greek drama) a series of three complete and usually related tragedies performed at the festival of Dionysus and forming a tetralogy with the satyr play.3. a group of three related things.[1655-65; < Gk trilogía. See TRI-, -LOGY]
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▪ arta series of three dramas or literary or musical compositions that, although each is in one sense complete, have a close mutual relation and form one theme or develop aspects of one basic concept. The term originally referred specifically to a group of three tragedies written by one author for competition. This trilogy constituted the traditional set of plays presented in Athens by a number of competitors at the 5th-century-BC drama festivals known as the Great Dionysia. One of the first authors to present such a trilogy was Aeschylus, whose Oresteia is the only surviving example from that time. Modern examples of trilogies include Robertson Davies's Deptford Trilogy and Roddy Doyle's Barrytown Trilogy.* * *
Universalium. 2010.