knowledge
//ˈnɒlɪdʒ//
Noun
1
Facts, information, and skills acquired through experience or education; the theoretical or practical understanding of a subject.
She has extensive knowledge of history.
2
Awareness or familiarity gained by experience of a fact or situation.
She has firsthand knowledge of the situation.
3
The sum of what is known; all that has been perceived, discovered, or learned.
The library contains the accumulated knowledge of centuries.