knowledge

/ˈnɒlɪdʒ/ noun

Definition

› [U, no plural] information and understanding that you have in your mind: He will easily find a job with his knowledge and skills. He has a detailed knowledge of naval history. He took the car without my knowledge (= I did not know).

to (the best of) sb's knowledge › used to say that someone thinks that something is true, but cannot be sure: To the best of my knowledge, she's never worked abroad.

(Definition of knowledge noun from the Cambridge Learner's Dictionary © Cambridge University Press)