Definition of certainty
1 : something that is certain
2 : the quality or state of being certain especially on the basis of evidence
Examples of certainty in a sentence
Scientists still do not know with any degree of certainty why the disease spread so quickly.
We cannot predict the outcome with absolute certainty.
There was no certainty that the package would arrive in time.
Her certainty about these complex moral issues is surprising.
Synonym Discussion of certainty
CERTAINTY Defined for English Language Learners
Definition of certainty for English Language Learners
: the state of being or feeling certain about something
: something that is certain : a fact about which there is no doubt
CERTAINTY Defined for Kids
Definition of certainty for Students
1 : something that is sure Victory was a certainty.
2 : the quality or state of being sure She answered with certainty.
Seen and Heard
What made you want to look up certainty? Please tell us where you read or heard it (including the quote, if possible).