From The Collaborative International Dictionary of English v.0.48 [gcide]:
Reappearance \Re`ap*pear"ance\ (-ans), n.
A second or new appearance; the act or state of appearing
again.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
reappearance
n 1: the event of something appearing again; "the reappearance
of Halley's comet"
2: the act of someone appearing again; "his reappearance as
Hamlet has been long awaited" [syn: reappearance, return]