What is Information?

Information: a message received and understood
Information: a collection of facts from which conclusions may be drawn, "statistical data"
Information: knowledge acquired through study or experience or instruction

Information: that which reduces uncertainty. (Claude Shannon)
Information: that which changes us. (Gregory Bateson)
Information must be something, although the exact nature isn't clear

Information must not be a repetition of previously received message
Information must be true; a lie or false or counterfactual information is mis-information.
Information must be about something.