Physical theatre is a genre of theatrical performance that pursues storytelling through primarily physical means. Several performance traditions all describe themselves as “physical theatre”, but the unifying aspect is a reliance on physical motion of the performers rather than or combined with text to convey the story. In basic sense, you talk through hand gestures, body language, thought track and many more physical features.
Blackfish Arts Academy Definition of physical theatre.
Helium Easy to understand article on exactly what is physical theatre?
Southern Cross Academy of Performing Arts Clear definition of physical theatre and the various characteristics this art form can potentially entail.