The definition of pathbreaking is new or innovative.
An example of something pathbreaking is a new communication tool.
Characterized by originality and innovation; pioneering.
- Opening a new path or approach
- a pathbreaking article
- The pathbreaking works of Lamarck were soon followed by the monumental treatise of Gerard Paul Deshayes (1795-1875) entitled Descriptions des coquilles fossiles des environs de Paris (1824-1837), the first of a series of great contributions by this and other authors.