Certainty Cer"tain*ty, n.; pl. {Certainties}. [OF. certainet['e].] 1. The quality, state, or condition, of being certain. [1913 Webster]

The certainty of punishment is the truest security against crimes. --Fisher Ames. [1913 Webster]

2. A fact or truth unquestionable established. [1913 Webster]

Certainties are uninteresting and sating. --Landor. [1913 Webster]

3. (Law) Clearness; freedom from ambiguity; lucidity. [1913 Webster]

{Of a certainty}, certainly. [1913 Webster]

The Collaborative International Dictionary of English. 2000.