- the quality, state, or fact of being certain
- pl. -·ties anything certain; definite act
Origin of certaintyMiddle English certeinte ; from Old French certaineté
of a certainty
Archaic without a doubt; certainly
- The fact, quality, or state of being certain, especially: a. Inevitability: the certainty of death.b. The quality of being established as true: the certainty that the earth orbits the sun.c. Confidence; assurance: his certainty that things would get better.
- Something that is clearly established or assured: “On the field of battle there are no certainties” (Tom Clancy).
(countable and uncountable, plural certainties)
- The state of being certain.
- An instance of being certain.
- A fact or truth unquestionably established.
- (state of being certain): uncertainty