Definition

This word describes something that is definite, reliable, or established without doubt. It can also refer to a specific but unnamed person or thing.

Example

I have a certain feeling that everything will be fine.

Conversation

Are you certain that the meeting is at 3 PM today?

Yes, I checked the calendar twice just to be sure.

I just want to make certain we don't miss it.

Don't worry, I’ll remind you before we leave.

Synonyms & Antonyms

Definition

A specific but not named group or number of people or things.

Example

Certain people prefer to work alone rather than in teams.

Conversation

I heard there are certain places we can't visit this weekend.

Really? I thought everything was open again.

Yeah, I think certain restrictions are still in place.

Root Explanation

Certain → It is formed from "certus" (meaning sure or fixed) and the suffix "-ain" (which is used to form adjectives). The word "certain" means sure or confident about something.

Memory Tip

Think of being 'sure' ('certus') about something — that's what it means to be certain.

Visually Confused Words