plural windmills
1
: a structure that has parts which are turned around by the wind and that is used to produce power, pump water, etc.
2
British
: pinwheel sense 1
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“Windmill.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/windmill. Accessed 22 Jun. 2026.
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