ˌfront-ˈrunner BrE AmE noun [countable]
the person or thing that is most likely to succeed in a competition:
the front-runner in June’s presidential election
ˌfront-ˈrunner BrE AmE noun [countable]
the person or thing that is most likely to succeed in a competition:
the front-runner in June’s presidential election
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012