involuntary

1. Not subject to the control of the will (synset 302531409)
   "involuntary manslaughter"; "involuntary servitude"; "an involuntary shudder"; "It (becoming a hero) was involuntary. They sank my boat"
   also:

   • unconscious - not conscious; lacking awareness and the capacity for sensory perception as if asleep or dead
   • unwilling - not disposed or inclined toward
   similar to:

   • driven, goaded - compelled forcibly by an outside agency
   • forced - forced or compelled
   • unconscious - without conscious volition
   • unwilled - without deliberate volition, desire, or intention
   • unwilling - in spite of contrary volition
   same as: nonvoluntary, unvoluntary
2. Controlled by the autonomic nervous system;
   Without conscious control (synset 302532576)
   "involuntary muscles"; "gave an involuntary start"
   referred to in: physiology - the branch of the biological sciences dealing with the functioning of organisms
   similar to:

   • automatic, reflex, reflexive - without volition or conscious control
   • autonomic - relating to or controlled by the autonomic nervous system
   • vegetative - relating to involuntary bodily functions

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