Noun

1. a dome, or domed building; a cupola

   • 1992: On the way they pointed out the tennis court and the old summerhouse, a mock tholos, Doric by way of Pompeii, and Stanford White, and (said Francis, who was scornful of this Victorian effort at classicism) D. W. Griffith and Cecil B. De Mille. — Donna Tartt, A Secret History

2. a dome-shaped tomb in ancient Greece