Dumbshow, also dumb show or dumb-show, is a traditional term for pantomime in drama, actions presented by actors onstage without spoken dialogue. It is similar to the masque. The term is most often used in regard to medieval drama and English Renaissance theatre, though it can apply in other pertinent contexts as well, as with the dammari pantomime of Kabuki theater. The most famous dumbshow in English literature occurs in Shakespeare’s Hamlet, Act III scene ii, in the play within a play staged by Prince Hamlet and the players at Elsinore Castle for King Claudius.
Dictionary.com Definition of Dumb Show.
Merriam Webster Dictionary Definition of Dumb Show.
The Cambridge Guide To Theatre Dumb Show extended definition in Google Books result.