1734, in the meaning defined at sense 1
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From the Editors at Merriam-Webster
A Countdown of Words with Numbers 10-1
From 'hang ten' to 'one-horse town'
Cite this Entry
“One-horse.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/one-horse. Accessed 4 Dec. 2020.
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