The Collaborative International Dictionary of English v.0.48:

Ensue \En*sue"\, v. t. [imp. & p. p. Ensued; p. pr. & vb. n.
   Ensuing.] [OF. ensevre, OF. & F. ensuivre, fr. L. insequi;
   in + sequi to pursue. See Sue.]
   To follow; to pursue; to follow and overtake. [Obs.] "Seek
   peace, and ensue it." --1 Pet. iii. 11.
   [1913 Webster]

         To ensue his example in doing the like mischief.
                                                  --Golding.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ensue \En*sue"\, v. i.
   To follow or come afterward; to follow as a consequence or in
   chronological succession; to result; as, an ensuing
   conclusion or effect; the year ensuing was a cold one.
   [1913 Webster]

         So spoke the Dame, but no applause ensued. --Pope.
   [1913 Webster]

         Damage to the mind or the body, or to both, ensues,
         unless the exciting cause be presently removed. --I.
                                                  Taylor.

   Syn: To follow; pursue; succeed. See Follow.
        [1913 Webster]

WordNet (r) 3.0 (2006):

ensue
    v 1: issue or terminate (in a specified way, state, etc.); end;
         "result in tragedy" [syn: result, ensue]

Moby Thesaurus II by Grady Ward, 1.0:

39 Moby Thesaurus words for "ensue":
   attend, become of, c, come about, come after, come next, come of,
   come on, come out, derive, develop, displace, emanate, end,
   eventuate, fall out, fare, follow, follow after, follow up,
   go after, inherit, issue, overtake, pan out, proceed, prove,
   prove to be, replace, result, stem, succeed, supervene, terminate,
   track, trail, turn out, unfold, work out