certain is on the Basic English 850 List.
cause - certain - chain
certain is one of the 1000 most common headwords.
centre - certain - chair

Pronunciation change

Adjective change


more certain

most certain

Certain is on the Academic Vocabulary List.
  1. If you are certain of something, you believe it to be true without doubt.
  2. If something is certain, it will happen without doubt.
  3. If you make certain of something, you check that it is true or correct.

Synonyms change

Determiner change


  1. (indefinite) (plural) Used to talk about groups or individuals without saying exactly which one(s).
    Certain problems can be solved with very simple maths.
    Her job gave her a certain freedom.
    Certain of the members did not agree.
  2. Used to mean only one fits or applies; in other words, specific.
    I'm not looking for a certain kind of car, not just any kind.

Synonyms change