rivalry

Noun

1. An ongoing relationship between (usually two) rivals who compete for superiority.
   • The Boston Bruins have a longstanding rivalry with the Montreal Canadiens.
   • James and Polly have a bitter rivalry due to the latter's inclusion in the Tea Time Teaser.

   Synonyms: contention

2. The characteristic of being a rivalrous good, such that it can be consumed or used by only one person at a time.
   • Common goods are those which are rivalrous in consumption but non-excludable
3. Any competition between two or more things or factors.
   • Binocular rivalry is a visual phenomenon in which perception alternates between different images presented to each eye.