For certain

usgb
adverb

Absolutely sure, without any doubt.

I know for certain that I left my keys here.
Visual representation of "for certain" - Absolutely sure, without any doubt

Often appears as...

  • know for certain
  • prove for certain
Definition 1 of 2
Visual representation of "for certain"
LampPro Tip 1/3

Certainty Level

Used to show you are completely sure about your knowledge or belief.

Illustration for Certainty Level
I can't say for certain if it'll rain tomorrow.
LampPro Tip 2/3

Stress Importance

Emphasize the absence of doubt in what is being stated or predicted.

Illustration for Stress Importance
The test results will come out negative for certain.
LampPro Tip 3/3

No Need for Proof

Express strong conviction even when proof is unavailable.

Illustration for No Need for Proof
She said for certain that she saw a dolphin in the river.
Visual representation of the word "For certain"

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