In chess, "dubious" refers to a move or opening that is believed to place the player who plays it at a disadvantage, but has not yet been decisively proven to be "unsound."

In chess notation, a dubious move is typically marked with an exclamation point followed by a question mark (!?) after the move notation.

Du"bi*ous (?), a. [L. dubius, dubiosus, fr. duo two. See Two, and cf. Doubt.]


Doubtful or not settled in opinion; being in doubt; wavering or fluctuating; undetermined.

"Dubious policy."

Sir T. Scott.

A dubious, agitated state of mind.



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

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



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

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


© Webster 1913.

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