Webster’s Revised Unabridged Dictionary · 1913
Atheneum
Ath′e·ne′um, Ath′e·næ′um, n.; pl. E. Atheneums, L. Athenæa. [L. Athenaeum, Gr. Ἀθην́αιον a temple of Minerva at Athens, fr. Ἀθηνᾶ, contr. fr. Ἀθηνάα, Ἀθηναία, in Homer Ἀθήνη, Ἀθηναίν, Athene (called Minerva by the Romans), the tutelary goddess of Athens.] 1. (Gr. Antiq.) A temple of Athene, at Athens, in which scholars and poets were accustomed to read their works and instruct students.
2. A school founded at Rome by Hadrian.
3. A literary or scientific association or club.
4. A building or an apartment where a library, periodicals, and newspapers are kept for use.