Ly·ce·um / līˈsēəm/ the garden at Athens in which Aristotle taught philosophy. ∎  (the Lyceum) Aristotelian philosophy and its followers. ∎  (a lyceum) archaic a literary institution, lecture hall, or teaching place.

Lyceum School in classical Athens where Aristotle taught. In later times, many educational institutions adopted the name, including a group devoted to adult education in the USA, founded in 1826, in which scholars such as Ralph Emerson and Henry Thoreau took part.

Lyceum the garden at Athens in which Aristotle taught philosophy; Aristotelian philosophy and its followers. The name comes via Latin from Greek Lukeion, neuter of Lukeios, epithet of Apollo (from whose neighbouring temple the Lyceum was named).

The Lyceum was also the name of a theatre near the Strand in London, noted for the melodramatic productions staged there by Henry Irving and others.

lyceum the garden in Athens where Aristotle taught XVI; place of study or instruction XVIII. — L. Lycēum — Gr. Lūkeion, n. of Lúkeios epithet of Apollo, to whose temple the Lyceum was adjacent.