UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈmjuːtɪzəm/US:USA pronunciation: respellingUSA pronunciation: respelling(myo̅o̅tiz əm)

WordReference Random House Unabridged Dictionary of American English © 2020
mut•ism  (myo̅o̅tiz əm),USA pronunciation n. [Psychiatry.]
  1. Psychiatryan inability to speak, due to a physical defect, conscious refusal, or psychogenic inhibition.
  • Neo-Latin mūtismus. See mute, -ism
  • 1815–25

Collins Concise English Dictionary © HarperCollins Publishers::
mutism /ˈmjuːtɪzəm/ n
  1. the state of being mute
  2. a refusal to speak although the mechanism of speech is not damaged
  3. the lack of development of speech, due usually to early deafness
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