DictionarycertaintyComplete confidence
noun

certainty

SUR-tuhn-tee/ˈsɜːrtnti/

Complete confidence that something is true or will happen.

She knows with certainty that the solid roof will keep off the rain.

Woman confidently closes umbrella while standing under simple sheltered doorway as rain visibly falls outside; assured safety beneath solid shelter rather than speculation, sparse vignette.
Etymology

The quality of being “sure” or “assured” came to describe an inward state: full assurance of mind. Certainty here is confidence with doubt removed.

In context

The Scottish Parliament36:11
despite what Mr Swinney said about the uncertainty over UK financing, the Scottish Government might be able to give farmers more confidence and certainty, so that they can plan for the future.
Rural Affairs and Islands Committee Debate: Future Agriculture Policy in Scotland - 25 May 2023

More examples

  • He answered with complete certainty.
  • There was no certainty about the outcome.
  • We wanted evidence rather than confident assertions of certainty.

Forms

certainty

Similar words

confidence
May be strong without excluding every doubt.
conviction
Conviction emphasizes firmly held belief rather than absence of doubt.