certain meaning

EN[ˈsɜːtn̩]
CA US

WCertain

AdjectiveCOMmore certainSUPmost certainSUF-ain
1. Sure, positive, not doubting.
  1. I was certain of my decision.
Determiner
1. Having been determined but unspecified. The quality of some particular subject or object which is known by the speaker to have been specifically singled out among similar entities of its class.
More Examples
1. Used in the Middle of Sentence
  - The computer usually defaults to autocorrecting certain spellings and capitalising first words of sentences.
  - Armand Marie, Pellagra (1910) p. 242. Certain of these “hydrophobias” are marked by a fear of flowing surfaces because of photophobia.
  - "I've been told by certain people that I have a tendency to overshare with strangers. I hope I haven't bored you with the details of my life.
2. Used in the Beginning of Sentence
  - Certain wagering individuals would profit from the outcome. ( adjectival )
  - Certain plants, viperine snake venom, resin and various bacteria contain toxalbumins
  - Certain minerals may exsolve into the atmosphere from an erupting volcano.

Meaning of certain for the defined word.

Grammatically, this word "certain" is an adjective. It's also a determiner.

Difficultness: Level 1

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Easy ➨ Difficult

Definiteness: Level 9

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Definite ➨ Versatile