In*vol"un*ta*ry (?), a. [L.
involuntarius. See In- not, and Voluntary.]
1. Not having will or the power of
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