erudite (adjective) - having or showing great knowledge or learning.

In a sentence

1. She could turn any conversation into an erudite discussion.

2. He was never dull, always erudite and well informed.

3. She's the author of an erudite book on pseudosexual attraction.

4. His guttural utterances are accompanied by erudite subtitles.

5. She was an erudite woman who insisted on fine distinctions.