What does the word involuntary mean?

Usage examples for involuntary

  1. The blow caught Marcella on the cheek, and she drew back with a slight involuntary cry. – Marcella by Mrs. Humphry Ward
  2. And then, again, of his involuntary guest. – The Mating of Lydia by Mrs. Humphry Ward
  3. Since they are controlled by the part of the nervous system which acts independently of the will, they are said to be involuntary. – Physiology and Hygiene for Secondary Schools by Francis M. Walters, A.M.

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