reigning
adj. B2 Upper Intermediate US //ˈɹeɪnɪŋ// UK //ɹˈeɪnɪŋ// reign·ing
adj. describing someone who is currently a champion or a leader, like a sports team that won the last trophy.
adj. currently holding a title, office, or championship. Often used attributively to describe a person or team that has not yet been defeated or replaced.
The reigning champion won the match easily.
The reigning world record holder will compete in the final race tomorrow evening.
Despite several strong challengers, the reigning monarch maintained a high level of public support throughout the difficult transition period.
Usage
Typically used attributively before the noun it modifies (e.g., 'reigning champion').