plural mammoths
1
: a type of large, hairy elephant that lived in ancient times and that had very long tusks that curved upward
2
: something that is very large
The little business she started by herself has now become a mammoth [=giant] in the industry.
: very large
a mammoth [=huge, gigantic] building
Renovating the house is a mammoth undertaking.
Cite this Entry
“Mammoth.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/mammoth. Accessed 19 Jun. 2026.
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