The Collaborative International Dictionary of English v.0.48:

Elope \E*lope"\, v. i. [imp. & p. p. Eloped; p. pr. & vb. n.
   Eloping.] [D. ontloopen to run away; pref. ont- (akin to G.
   ent-, AS. and-, cf. E. answer) + loopen to run; akin to E.
   leap. See Leap, v. t.]
   To run away, or escape privately, from the place or station
   to which one is bound by duty; -- said especially of a woman
   or a man, either married or unmarried, who runs away with a
   paramour or a sweetheart.
   [1913 Webster]

         Great numbers of them [the women] have eloped from
         their allegiance.                        --Addison.
   [1913 Webster]

WordNet (r) 3.0 (2006):

elope
    v 1: run away secretly with one's beloved; "The young couple
         eloped and got married in Las Vegas" [syn: elope, run
         off]