The Collaborative International Dictionary of English v.0.48:
Rodeo \Ro*de"o\, n. [SP., a going round.] A round-up. See Round-up. [Western U.S.] [1913 Webster]WordNet (r) 3.0 (2006):
rodeo n 1: an exhibition of cowboy skills 2: an enclosure for cattle that have been rounded up