1. things that are definitely true or will definitely happen
Usage: plural of certainty
2. the state of being completely confident or having no doubts about something
Usage: plural of certainty

Examples

• Death and taxes are often called life’s only certainties.
• The scientist spoke about the certainties established by decades of research.
• In times of change, people cling to whatever certainties they can find.
• The coach’s certainties about the team’s abilities proved correct.
• Mathematical theorems provide certainties in an uncertain world.
• Her certainties about the future were shaken by recent events.