from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A small domical mountain or hill.
from The Century Dictionary and Cyclopedia
- n. A round excavated tomb lined with masonry. See beehive tomb.
- n. In classical arch., any circular building, as that designed by Polycletus at Epidaurus; also, a dome or cupola; a domed structure; specifically, at Athens, the round chamber, or rotunda, a public building connected with the prytaneum, in which the prytanes dined.
From Latin tholus ("dome, rotunda"). (Wiktionary)