certainty.

A firm sense that something is true or will happen, or something regarded as assured.

Use it for

Words that belong together

• absolute certainty
• a practical certainty

On the page

Her certainty exceeded what the evidence justified.

Usage notes

Primary category: analysis / argumentation / evidence. Forms: Countable or uncountable by context; countable singular certainty; plural certainties. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Commonness: moderately common.