What is Notorious?

Legal Definition
In the law of evidence, matters deemed notorious do not require to be proved. There does not seem to be any recognized rule as to what matters are deemed notorious. Cases have occurred in which the state of society or public feeling has been treated as notorious; e. g., during times of sedition. Best, Ev. 354; Sweet.
See also
-- Black's Law Dictionary
Legal Definition
Possessing such elements of notoriety of another’s claim that one may be presumed to have notice of it and of its extent. See 33 Fla. 261, 39 Am. St. Rep. 139, 14 South. 805.
-- Ballentine's Law Dictionary