Webster's Revised Unabridged Dictionary · 1913

Certainty

Certainty , noun

[Old French certaineté.]

1.
The quality, state, or condition, of being certain.
The certainty of punishment is the truest security against crimes.
2.
A fact or truth unquestionable established.
Certainties are uninteresting and sating. — Landor
3.
(Law) Clearness; freedom from ambiguity; lucidity.
Collocations (1)
Of a certainty , certainly.