1.
[syn: credibly, believably, plausibly, probably]
The Collaborative International Dictionary of English v.0.48:
Credibly \Cred"i*bly\, adv.
In a manner inducing belief; as, I have been credibly
informed of the event.
[1913 Webster]
WordNet (r) 3.0 (2006):
credibly
adv 1: easy to believe on the basis of available evidence; "he
talked plausibly before the committee"; "he will probably
win the election" [syn: credibly, believably,
plausibly, probably] [ant: implausibly,
improbably, incredibly, unbelievably]