The Collaborative International Dictionary of English v.0.48:
Trivially \Triv"i*al*ly\, adv. In a trivial manner. [1913 Webster]WordNet (r) 3.0 (2006):
trivially adv 1: with little effort; "we can prove trivially that this theorem is false" 2: in a frivolously trivial manner; "trivially motivated requests"