Definition of “I know” - English Dictionary

british dictionary

“I know” in British English

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I know

B1 said when you suddenly think of a good idea, an answer, or a solution:

I know - let's go to the beach!

B2 said to show you agree with something someone has just said:

"But he's so awful." "I know - he's dreadful."

(Definition of “I know” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)