Du"bi*ous (?), a. [L. dubius, dubiosus, fr. duo two. See Two, and cf. Doubt.] 1. Doubtful or not settled in opinion; being in doubt; wavering or fluctuating; undetermined. "Dubious policy." Sir T. Scott.

A dubious, agitated state of mind.

2. Occasioning doubt; not clear, or obvious; equivocal; questionable; doubtful; as, a dubious answer.

Wiping the dingy shirt with a still more dubious pocket handkerchief.

3. Of uncertain event or issue; as, in dubious battle.

Syn. -- Doubtful; doubting; unsettled; undetermined; equivocal; uncertain. Cf. Doubtful.

• Uncertain, doubtful, questionable