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Pronunciation:  in'vâlun`teree

WordNet Dictionary
  1. [adj]  not subject to the control of the will; "involuntary manslaughter"; "involuntary servitude"; "an involuntary shudder"; "It (becoming a hero) was involuntary. They sank my boat"- John F.Kennedy
  2. [adj]  (physiology) controlled by the autonomic nervous system; without conscious control; "involuntary muscles"; "gave an involuntary start"

INVOLUNTARY is a 11 letter word that starts with I.


 Synonyms: automatic, autonomic, driven, forced, goaded, nonvoluntary, reflex(a), reflexive, unconscious, unvoluntary, unwilled, unwilling, vegetative
 Antonyms: voluntary



Webster's 1913 Dictionary
\In*vol"un*ta*ry\, a. [L. involuntarius. See {In-}
not, and {Voluntary}.]
1. Not having will or the power of choice.

2. Not under the influence or control of the will; not
   voluntary; as, the involuntary movements of the body;
   involuntary muscle fibers.

3. Not proceeding from choice; done unwillingly; reluctant;
   compulsory; as, involuntary submission.

Medical Dictionary
 Definition: Not controlled through will.
Thesaurus Terms
 Related Terms: at odds, automatic, averse, binding, blind, casual, compulsive, compulsory, conditioned, cursory, dictated, differing, disagreeing, disinclined, disobedient, forced, fractious, gut, ill-advised, ill-considered, ill-devised, imperative, impulsive, inadvertent, indeliberate, indisposed, indocile, inevitable, inherent, innate, instinctive, instinctual, libidinal, mandatory, mechanical, mutinous, natural, necessary, obligatory, opposed, perfunctory, recalcitrant, reflex, reflexive, refractory, required, resistant, snap, spontaneous, subliminal, sulky, sullen, unadvised, uncalculated, unconscious, unconsenting, unconsidered, uncontrollable, uncontrolled, undeliberate, undeliberated, undesigned, unguarded, unguided, unintended, unintentional, unlearned, unmeant, unmeditated, unplanned, unpremeditated, unprompted, unpurposed, unstudied, unthinking, unthought-of, unwilled, unwilling, unwitting