The Collaborative International Dictionary of English v.0.48:
Etern \E*tern"\ or Eterne \E*terne"\, a. [OF. eterne, L.
   aeternus, for aeviturnus, fr. aevum age. See Age, and cf.
   Eternal.]
   Eternal. [Poetic] --Shak.
   [1913 Webster]
         Built up to eterne significance.         --Mrs.
                                                  Browning.
   [1913 Webster]