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over·​thin ˌō-vər-ˈthin How to pronounce overthin (audio)
: excessively thin
overthin paint
She was … overthin, as if a hypercharged metabolism was burning off calories faster than she could stuff them into her mouth.Bonnie MacDougal


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overthinned; overthinning

transitive + intransitive

: to make (something) too thin : to thin (something) too much
overthinning a tree with too much pruning
It is thinned with water just as the paints are, but care should be taken not to overthin and lose the quality of the gesso.William F. Powell

Word History

First Known Use


circa 1639, in the meaning defined above


1819, in the meaning defined above

Time Traveler
The first known use of overthin was circa 1639

Dictionary Entries Near overthin

Cite this Entry

“Overthin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/overthin. Accessed 24 Sep. 2023.

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