[ too-myuh-luh s, tyoo- ]
/ ˈtu myə ləs, ˈtyu- /

noun, plural tu·mu·lus·es, tu·mu·li [too-myuh-lahy, tyoo-] /ˈtu myəˌlaɪ, ˈtyu-/.

Archaeology. an artificial mound, especially over a grave; barrow.
Geology. a domelike swelling or mound formed in congealed lava.

Origin of tumulus

1680–90; < Latin: mound, swelling, equivalent to tum(ēre) to swell + -ulus -ule
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for tumulus

British Dictionary definitions for tumulus

/ (ˈtjuːmjʊləs) /

noun plural -li (-liː)

archaeol (no longer in technical usage) another word for barrow 2

Word Origin for tumulus

C17: from Latin: a hillock, from tumēre to swell up
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012