Dubious; not settled in opinion; undetermined; wavering; hesitating; applied to persons; as, we are doubtful of a fact, or of the propriety of a measure.

Dubious; ambiguous; not clear in its meaning; as a doubtful expression.

Admitting of doubt; not obvious, clear or certain; questionable; not decided; as a doubtful case; a doubtful proposition; it is doubtful what will be the event of the war.

Of uncertain issue. We have sustained one day in doubtful fight.

Not secure; suspicious; as, we cast a doubtful eye.

Not confident; not without fear; indicating doubt. With doubtful feet, and wavering resolution.

Not certain or defined; as a doubtful hue.