/ Dictionary / Index I involuntary: Meaning and Definition of Find definitions for: in•vol•un•tar•y Pronunciation: (in-vol'un-ter"ē), [key] — adj. not voluntary; independent of one's will; not by one's own choice: an involuntary listener; involuntary servitude. unintentional; unconscious: an involuntary gesture. acting independently of or done or occurring without volition: involuntary muscles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: involuntary (Thesaurus) involucrum involute Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language