Definition for CER'TAIN-TY


  1. A fixed or real state; truth; fact. Know for a certainty, that the Lord your God will no more drive out these nations. – Josh. xxiii. Luke i.
  2. Full assurance of mind; exemption from doubt. Certainty is the perception of the agreement or disagreement of our ideas. – Locke.
  3. Exemption from failure; as, the certainty of an event, or of the success of a medicine. The certainty of punishment is the truest security against crimes. – Ames.
  4. Regularity; settled state.

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