certainty

/ˈsər-tᵊn-tē/

Middle English certeinte, borrowed from Anglo-French certeinté, from certein, certain + -té -ty

noun

  1. something that is certain

  2. the quality or state of being certain especially on the basis of evidence

certainty certitude conviction mean a state of being free from doubt. certainty and certitude are very close; certainty may stress the existence of objective proof , while certitude may emphasize a faith in something not needing or not capable of proof.

idiom

  1. nearly certain or definite

His victory in the election is almost a certainty.

idiom

  1. in a certain or definite way

It is difficult to say with certainty which of the plays was written first.