a television or radio program or motion picture about the Wild West, often presented serially and usually dealing with adventures of cowboys, gunmen, gold prospectors, etc.Compare Western(def 8).
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Examples from the Web for horse opera
Historical Examples of horse opera
She was quite ashamed that he detected her once in going to the Horse-Opera, he must think her taste so low.
Professor Cramer conducted a side-show in the wake of a horse-opera, and the same sojourned at Colusa.The Fiend's Delight
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012