adjective
- sure or confident about something; having no doubt
- definitely true or going to happen; without question
- particular but not named or specified
pronoun
- some people or things, but not all
Usage: used with 'of'
Examples
- I’m certain that I locked the door before leaving.
- It’s certain to rain tomorrow according to the forecast.
- The team’s victory seemed certain after they scored three goals.
- There are certain rules you must follow in this building.
- She has a certain charm that everyone notices.
- Certain of the students were absent today.
- The medicine will work, but only under certain conditions.