Involuntary



[in-vol-uh n-ter-ee] /ɪnˈvɒl ənˌtɛr i/

adjective
1.
not voluntary; independent of one’s will; not by one’s own choice:
an involuntary listener; involuntary servitude.
2.
unintentional; unconscious:
an involuntary gesture.
3.
Physiology. acting independently of or done or occurring without volition:
involuntary muscles.
/ɪnˈvɒləntərɪ; -trɪ/
adjective
1.
carried out without one’s conscious wishes; not voluntary; unintentional
2.
(physiol) (esp of a movement or muscle) performed or acting without conscious control
adj.

mid-15c., from Late Latin involuntarius “involuntary,” from in- “not, opposite of” (see in- (1)) + Latin voluntarius (see voluntary). Related: Involuntarily.

involuntary in·vol·un·tar·y (ĭn-vŏl’ən-těr’ē)
adj.

involuntary
(ĭn-vŏl’ən-těr’ē)
Not under conscious control. Most of the biological processes in animals that are vital to life, such as contraction of the heart, blood flow, breathing, and digestion, are involuntary and controlled by the autonomic nervous system.

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