moldboard

noun

mold·​board ˈmōl(d)-ˌbȯrd How to pronounce moldboard (audio)
1
: a curved iron plate attached above a plowshare to lift and turn the soil
2
: a blade on a machine (such as a bulldozer) that pushes material to one side as the machine advances

Examples of moldboard in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Sarah explained that as pre-tractor farmers plowed, the moldboard pushed earth to one side, building up the ridge at the expense of the furrow. Literary Hub, 19 Feb. 2026

Word History

First Known Use

1508, in the meaning defined at sense 1

Time Traveler
The first known use of moldboard was in 1508

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Cite this Entry

“Moldboard.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/moldboard. Accessed 24 Feb. 2026.

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