Modder
geographical name
Mod·der
ˈmä-dər 
river 180 miles (290 kilometers) long in Free State, Republic of South Africa
Note: The Modder River is a tributary of the Vaal River.
Cite this Entry
“Modder.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Modder. Accessed 4 Nov. 2025.
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