(1):
(a.) In diplomacy (esp. in the form identic), precisely agreeing in sentiment or opinion and form or manner of expression; - applied to concerted action or language which is used by two or more governments in treating with another government.
(2):
(a.) The same; the selfsame; the very same; not different; as, the identical person or thing.
(3):
(a.) Uttering sameness or the same truth; expressing in the predicate what is given, or obviously implied, in the subject; tautological.