1. (adverb)believably in a believable manner Synonyms: plausibly, probably, credibly Antonyms: unbelievably, improbably, implausibly, incredibly
2. (adverb)credibly, believably, plausibly, probably easy to believe on the basis of available evidence Synonyms: credibly, in all probability, probably, in all likelihood, likely, believably, plausibly, belike Antonyms: unbelievably, implausibly, incredibly, improbably