Of or pertaining to learning; possessing, or characterized by, learning, esp. scholastic learning; erudite; well-informed; as, a learned scholar, writer, or lawyer; a learned book; a learned theory.

having or showing profound knowledge; "a learned jurist"; "an erudite professor"

(culto) In the context of the history of Spanish, learned words are those which have not had a continuous descent from spoken Latin but which have been borrowed directly from Latin as a result of learned awareness of Latin from the Middle Ages on. Such words are minimally adapted to the sound pattern of Spanish, eg artículo ARTICULUS (compare the popular form artejo, which is derived directly from Latin).

highly educated; having extensive information or understanding; "an enlightened public"; "knowing instructors"; "a knowledgeable critic"; "a knowledgeable audience"

acquired by learning; "learned skills"

established by conditioning or learning; "a conditioned response"