Definition of "rivalry"

rivalry

/ˈɹaɪ.vəl.ɹi/

noun
countable and uncountable, plural rivalries
1. An ongoing relationship between (usually two) rivals who compete for superiority.
2. (economics) The characteristic of being a rivalrous good, such that it can be consumed or used by only one person at a time.
  Quotations
  2013 December 2 (last accessed), Department of Economics, University of Pittsburgh, at Johnstown, “Public Goods”, in (Please provide the book title or journal name)‎, archived from the original on 5 May 2015
3. Any competition between two or more things or factors.