Functions both as a verb and as a noun. As a verb it basically means "to know", and given the context you can broaden the field of the translation by choosing "to conceptualize", and also sometimes "to understand", "to cognize", etc. As a noun, it basically means knowledge in the most ordinary sense of the word but, again, given the context, you may adapt the translation to "cognition", "learning", "science", even "recogntion", etc. Sometimes you also have it with the meaning of consciousness.
THOUGH A MAN BE LEARNED
IF HE DOES NOT APPLY HIS KNOWLEDGE
HE RESEMBLES THE BLIND MAN
WHO WITH A LAMP IN THE HAND CANNOT SEE THE ROAD