If you describe someone as erudite, you mean that they have or show great academic knowledge. You can also use erudite to describe something such as a book or a style of writing. He was never dull, always erudite and well informed. an original and highly erudite style. showing a lot of knowledge based on careful study = learned (past participle of erudire , from rudis )
\AIR-yuh-dyt; -uh-dyt\, adjective: Characterized by extensive reading or knowledge; learned