erudite
Having deep, wide knowledge from lots of reading and study.
Erudite means having or showing great knowledge gained from reading and study. An erudite person has learned deeply about many subjects through years of careful reading, thinking, and scholarship.
The word suggests knowledge that goes beyond memorizing facts to understanding complex ideas and connections. An erudite professor understands complex ideas and can explain them clearly. An erudite historian has read hundreds of original sources and can see connections others might miss. When someone writes an erudite analysis of a novel, they draw on wide knowledge of literature, history, and culture to illuminate the text.
Erudite carries a tone of respect and admiration. It describes the kind of deep learning that comes from curiosity and dedication, not just cramming for tests. You might call your grandfather erudite if he’s spent a lifetime reading about philosophy, science, and world history. A book reviewer might praise an author’s erudite style when the writing shows both knowledge and wisdom.