information, understanding, or skills, acquired through learning or experience

the pursuit of knowledge

I had some knowledge of first aid

the total body of known facts, or those associated with a particular subject

First come I; my name is Jowett. There's no knowledge but I know it. I am the master of this college: what I don't know isn't knowledge — H C Beeching

in philosophy, justified or verifiable belief, as distinct from opinion

awareness of something

If he left the house this afternoon he did so without my knowledge