Dictionary
in•vol•un•tar•y
Pronunciation: (in-vol'un-ter"ē), [key]—
adj.
1. not voluntary; independent of one's will; not by one's own choice:
an involuntary listener; involuntary servitude.
2. unintentional; unconscious:
an involuntary gesture.
3. Physiol.acting independently of or done or occurring without volition:
involuntary muscles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.