'Credible' definitions:

Definition of 'credible'

From: WordNet
adjective
Capable of being believed; "completely credible testimony"; "credible information" [syn: credible, believable] [ant: incredible, unbelievable]
adjective
(a common but incorrect usage where `credulous' would be appropriate) credulous; "she was not the...credible fool he expected"
adjective
Appearing to merit belief or acceptance; "a credible witness"

Definition of 'Credible'

From: GCIDE
  • Credible \Cred"i*ble\ (kr[e^]d"[i^]*b'l), a. [L. credibilis, fr. credere. See Creed.] Capable of being credited or believed; worthy of belief; entitled to confidence; trustworthy. [1913 Webster]
  • Things are made credible either by the known condition and quality of the utterer or by the manifest likelihood of truth in themselves. --Hooker. [1913 Webster]
  • A very diligent and observing person, and likewise very sober and credible. --Dampier. [1913 Webster]