Facts, information, and skills acquired through experience or education; the theoretical or practical understanding of a subject:
a thirst for knowledge
her considerable knowledge of antiques
The sum of what is known:
the transmission of knowledge
Information held on a computer system.
Philosophy True, justified belief; certain understanding, as opposed to opinion.
Awareness or familiarity gained by experience of a fact or situation:
the programme had been developed without his knowledge
he denied all knowledge of the incidents
archaic Sexual intercourse.