Definitions

1. noun

A building or institution where books and other documents are kept for reading, study, or reference, especially one that is free and open to the public, typically supported by subscription or endowment.

“The local athenaeum offered a vast collection of rare books and manuscripts for its members to peruse.”

2. noun

A society or institution founded for the promotion of literature, science, or art.

“The athenaeum was established to encourage the study and appreciation of classical music in the community.”