In*vol"un*ta*ry (?), a. [L. involuntarius. See In- not, and Voluntary.]

1.

Not having will of the power of choice.

2.

Not under the influence or control of the will; not voluntary; as, the involuntary movements of the body; involuntary muscle fibers.

3.

Not proceeding from choice; done unwillingly; reluctant; compulsory; as, involuntary submission.

© Webster 1913.