The Collaborative International Dictionary of English v.0.48:

Hibernate \Hi"ber*nate\, v. i. [imp. & p. p. Hibernated; p.
   pr. & vb. n. Hibernating.] [L. hibernare, hibernatum, fr.
   hibernus wintry. See Hibernal.]
   To winter; to pass the season of winter in close quarters, in
   a torpid or lethargic state, as certain mammals, reptiles,
   and insects.
   [1913 Webster]

         Inclination would lead me to hibernate, during half the
         year, in this uncomfortable climate of Great Britain.
                                                  --Southey.
   [1913 Webster]