Definition of dead-ender in English:

dead-ender

noun

informal
  • 1US A person who continues to support a particular cause, political candidate, etc., even when there is seemingly no chance of success.

    ‘the legions of dead-enders still sporting signs for the lost cause’
  • 2A person whose situation offers no prospects for progress or improvement.

    ‘it's the bleakest of cities, filled with dropouts and dead-enders’