1. take place as an additional or unexpected development;
The Collaborative International Dictionary of English v.0.48:
Supervene \Su`per*vene"\, v. i. [imp. & p. p. Supervened; p.
pr. & vb. n. Supervening.] [L. supervenire, superventum, to
come over, to come upon; super over + venire to come. See
Super-, and Come, and cf. Overcome.]
To come as something additional or extraneous; to occur with
reference or relation to something else; to happen upon or
after something else; to be added; to take place; to happen.
Such a mutual gravitation can never supervene to matter
unless impressed by divine power. --Bentley.
A tyrany immediately supervened. --Burke.
WordNet (r) 3.0 (2006):
v 1: take place as an additional or unexpected development