According to the American Physical Therapy Association, evidence-based practice is "the integration of best available research, clinical expertise, and patient values and circumstances related to patient and client management, practice management, and health policy decision-making".
The American Physical Therapy Association provides additional information about Evidence-based practice, research, and tools within their "Practice & Patient Care" section.
Below is a short white-board video, produced by the Veteran's Health Administration, providing an overview of what it means for treatments to be considered "evidence-based"