credible /ˈkɹɛdəbl̩/ adjective3 •Believable or plausible.While WMRE makes clear that electrification is the only credible option to decarbonise, it says that bi-mode trains could be used in the interim. — 2022 •Dependable, trustworthy, or reliable.credible sources •Authentic or convincing. formsmore credible · most credible