Meaning : Not subject to the control of the will.
Example :
Involuntary manslaughter.
Involuntary servitude.
An involuntary shudder.
It (becoming a hero) was involuntary. They sank my boat.
Synonyms : nonvoluntary, unvoluntary
Of your own free will or design. Done by choice. Not forced or compelled.
Man is a voluntary agent.Meaning : Controlled by the autonomic nervous system. Without conscious control.
Example :
Involuntary muscles.
Gave an involuntary start.