Main Entry:

du·bi·ous

Pronunciation:

\ˈdü-bē-əs also dyü-\

Function:

adjective

Etymology:

Latin dubius, from dubare to vacillate; akin to Latin duo two — more at two

Date:

1548

1: giving rise to uncertainty: as a: of doubtful promise or outcome <a dubious plan> b: questionable or suspect as to true nature or quality <the practice is of dubious legality> 2: unsettled in opinion : doubtful <I was dubious about the plan>

synonyms see doubtful

— du·bi·ous·ly adverb

— du·bi·ous·ness noun