What is Judicial Notice?

Legal Definition
Judicial notice is a rule in the law of evidence that allows a fact to be introduced into evidence if the truth of that fact is so notorious or well known, or so authoritatively attested, that it cannot reasonably be doubted. This is done upon the request of the party seeking to rely on the fact at issue. Facts and materials admitted under judicial notice are accepted without being formally introduced by a witness or other rule of evidence, and they are even admitted if one party wishes to lead evidence to the contrary.

Judicial notice is frequently used for the simplest, most obvious common sense facts, such as which day of the week corresponded to a particular calendar date or the approximate time at sunset. However, it could even be used within one state to notice a law of another state—such as one which provides average baselines for motor vehicle stopping distances.
-- Wikipedia
Legal Definition
Judicial notice is used by a court when it declares a fact presented as evidence as true without a formal presentation of evidence. A court can take judicial notice of indisputable facts. If a court takes judicial notice of an indisputable fact in a civil case, the fact is considered conclusive.
Legal Definition
Evidence in some cases without hearing or inquiry, is accepted by a court. It is typically a well known or notorious or indisputable, proven fact.
Legal Definition
The act by which a court, in conducting a trial, or framing its decision, will, of its own motion, and without the production of evidence, recognize the existence and truth of certain facts, having a bearing on the controversy at bsr, and which, from their nature, are not properly the subject of testimony, or which are universally regarded as established by common notoriety, e. g., the laws of the state, international law, historical evenis, the constitution and course of nature, main geographical features, etc. North Hempstead v. Gregory, 53 App. Div. 350, 65 N. Y. Supp. 867; State v. Main, 69 Conn. 123, 37 Atl. 80, 36 L. R. A. 623, 61 Am. St Rep. 30.
-- Black's Law Dictionary
Legal Definition
A court's recognition of certain commonly known facts without requiring proof thereof. See 116 N. Y. 615, 6 L. R. A. 246, 23 N. E. 9.
-- Ballentine's Law Dictionary