n. One having a common right or privilege with another; an associate; an alternating partner or companion in duty.n. One who is in pursuit of the same object as another; one who strives to reach or obtain something which another is attempting to obtain, and which only one can possess; a competitor: as, rivals in love; rivals for a crown.n. One who emulates or strives to equal or exceed another in excellence; a competitor; an antagonist: as, two rivals in eloquence.n. Synonyms and See emulation.Having the same pretensions or claims; standing in competition for superiority: as, rival lovers; rival claims or pretensions.To stand in competition with; seek to gain something in opposition to: as, to rival one in love.To strive to equal or excel; emulate.To be a competitor; act as a rival.