From King Dictionary of Contemporary English
Related topics: Theatre
mummermum‧mer /ˈmʌmə $ -ər/ noun [countable] APTan actor in a simple traditional play that does not have wordsmumming noun [uncountable]
Examples from the Corpus
mummerCapering through contemporary photography like a mummer gatecrashing the court ball, Jo Spence showed up all the medium's conceits.But the Christmas mummers remained - and some who read this will be able to recall them.Stalls were out and there were mummers performing miracle plays.