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意志の制御の支配下にない無意識
例:an involuntary shudder 意図しない身震い
controlled by the autonomic nervous system; without conscious control; "involuntary muscles"; "gave an involuntary start"自律神経系によって制御される無意識