1. (a.) Against one's will; without choice; or not under the control of the will; as, involuntary muscles\.

2. (a.) Not having will or the power of choice.

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

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