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]