cer ‧ tain ‧ ty /ˈsɜːtnti $ ˈsɜːr-/ BrE AmE noun ( plural certainties )
[ Word Family: noun : ↑ certainty ≠ ↑ uncertainty ; adverb : ↑ certainly ≠ ↑ uncertainly ; adjective : ↑ certain ≠ ↑ uncertain ]
1 . [uncountable] the state of being completely certain
with certainty
She knew with absolute certainty that he’d say no.
The result is impossible to predict with any degree of certainty.
2 . [uncountable] the fact that something is certain to happen
certainty of (doing) something
the certainty of being caught
certainty that
There’s no certainty that he’ll remember.
3 . [countable] something that is definitely true or that will definitely happen:
He usually does quite well, but it’s not a certainty.
The only certainty is that there will need to be major changes.