Involuntary:Done other thaninaccordance with the conscious will of the individual. The opposite ofvoluntary.
The terms "voluntary" and "involuntary" apply to the human nervous system and itscontrolover muscles. The nervous system is divided into two parts --somaticand autonomic. The somatic nervous system operates muscles that are under voluntary control. The autonomic (automatic orvisceral) nervous system regulates individualorganfunction and is involuntary. Opening themouthis voluntary while blushing is involuntary.
