Webster's Revised Unabridged Dictionary · 1913

Ambiguity

Ambiguity ({not transcribed}) , noun

[Latin ambiguitas, from ambiguus: compare French ambiguité.]

The quality or state of being ambiguous; doubtfulness or uncertainty, particularly as to the signification of language, arising from its admitting of more than one meaning; an equivocal word or expression.
No shadow of ambiguity can rest upon the course to be pursued. — I. Taylor
The words are of single signification, without any ambiguity. — South