The definition of certitude means absolute confidence in something or an unquestioning belief in something. People who are very religious express certitude about their faith. The state of being certain or convinced of something; complete assurance; confidence.

What is definition of certitude?

1 : the state of being or feeling certain. 2 : certainty of act or event. 3 : something that is certain : certainty In the United States, death is feared … . Though it is a certitude that we all must deal with someday …—

How do you express certitude?

Yes, I am certain. I'm absolutely sure. I have no doubt about it.