Knowledge  – acquaintance with facts, truths, or principles, as from study or investigation; general erudition:
knowledge of many things; familiarity or conversance, as with a particular subject or branch of learning:
A knowledge of accounting was necessary for the job; acquaintance or familiarity gained by sight, experience, or report:
a knowledge of human nature; the fact or state of knowing; the perception of fact or truth; clear and certain mental apprehension; awareness, as of a fact or circumstance:
He had knowledge of her good fortune; something that is or may be known; information:
He sought knowledge of her activities; the body of truths or facts accumulated in the course of time; the sum of what is known:
Knowledge of the true situation is limited; creating, involving, using, or disseminating special knowledge or information:
A computer expert can always find a good job in the knowledge industry.