Rĭ'val1, n.
n. [Fr. & Sp. rival, It. rivale, Lat. rivales, two neighbors having the same brook in common, rivals, from rivalis, belonging to a brook, from rivus, a brook.] 1. A person having a common right or privilege with another; a partner. [Obs.] If you do meet Horatio And Marcellus, the rivals of my watch, Bid them make haste. Shak. 2. One who is in pursuit of the same object as another; one striving to reach or obtain something which another is attempting to obtain, and which one only can possess; a competitor; as, rivals in love; rivals for a crown. ☞ “Rivals, in the primary sense of the word, are those who dwell on the banks of the same stream. But since, as all experience shows, there is no such fruitful source of contention as a water-right, it would continually happen that these occupants of the opposite banks would be at strife with one another in regard to the periods during which they severally had a right to the use of the stream, turning it off into their own fields before the time, or leaving open the sluices beyond the time, or in other ways interfering, or being counted to interfere, with the rights of their opposite neighbors. And thus ‘rivals’ . . . came to be used of any who were on any grounds in more or less unfriendly competition with one another.” Trench. Syn.—Competitor; emulator; antagonist.