O'Fallon
geographical name
O'·Fal·lon
ō-ˈfa-lən 
city in eastern Missouri west-northwest of Saint Louis population 79,329
Cite this Entry
“O'Fallon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/O%27Fallon. Accessed 29 Nov. 2025.
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