Meaning of “knowledge” - Learner’s Dictionary

knowledge

noun us uk /ˈnɒlɪdʒ/
to acquire knowledgeThe course requires no prior knowledge of Spanish.I was amazed at the depth of her knowledge.He denied any knowledge of the matter.She insisted that the drugs had been planted on her without her knowledge.

B1 [ 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

B2 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” from the Cambridge Learner’s Dictionary © Cambridge University Press)