You are a restless seeker, a Philosophy-Junkie. And you want to know all about ‘Know’. You want to know what ‘Knowledge’ means.
Not to worry. There is such a subject. And it is called Epistemology. You’ve come to the right department.
Epistemology is the scholarly study of ‘Knowing’ while firmly resident in the Know. It is knowing all about ‘Knowing’ and ‘Knowledge’. [Can you smell the Self-Loop?]
Empistemology [‘Know’] and Ontology [‘Be’] are the twin foundations of Philosophy. Any grand discourse on Philosophy without a clear investigated statement about these two stances is not worth the paper it is written on.
So you ask a Professor of Epistemology for the definition of the word ‘Knowledge’.
He might give you list [a safe response] but odds are that on that list is the phrase ‘Justified True Belief’ or something very close. [The original translated phrase from the Classical Greek is ‘True Belief with an Account’].
What’s so special about ‘Justified True Belief? It is the closest thing we have to an original definition for the word ‘Knowledge’. And it first emerges in the Theaetetus, in Plato’s Dialogues. Hence it is the ‘Classic’ definition.
The Theaetetus is where it all began. It is the source, the Mother-Lode for this subject called Epistemology.
And the Theaetetus, the founding source for the classic definition of ‘Knowledge’ is not about what ‘Knowledge’ is, but rather about what it is not. And why the word ‘Knowledge’ cannot be defined [read it].