up·​stroke ˈəp-ˌstrōk How to pronounce upstroke (audio)
: a stroke (as of a pen) made in an upward direction

Example Sentences

Recent Examples on the Web Findings show the downstroke of both pairs of flippers proved more powerful than the upstroke. Tim Newcomb, Popular Mechanics, 21 June 2022 The receiving partner leads on rocking with the upstroke and the penetrating partner leads on the downstroke. Dr. Nan Wise, Glamour, 19 Mar. 2021 In our hippogriff, the muscles of the back drive the upstroke, and the muscles of the chest power the downstroke, just as in living bats and long-extinct pterosaurs. Michael B. Habib, Scientific American, 17 Mar. 2021 During a wing upstroke, for instance, air can filter through the wing to propel it upward. Courtney Linder, Popular Mechanics, 9 July 2020 Breast: Archaeopteryx lacked the modern bird’s prominent breastbone, which anchors flight muscles and guides the tendons that facilitate a rapid upstroke. Jonathon Keats, Discover Magazine, 21 June 2019 The sideways orientation of the Archaeopteryx shoulder allowed flapping, but limited the upstroke. Jonathon Keats, Discover Magazine, 21 June 2019 Pedal cages add power on the upstroke to improve pedaling efficiency. Popular Mechanics, 27 Aug. 2010 A hydrodynamic analysis of the humpback's movements in the lab confirmed that both the upstroke and the downstroke of its flippers provide forward thrust. Carrie Arnold, National Geographic, 12 July 2017 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'upstroke.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

1828, in the meaning defined above

Time Traveler
The first known use of upstroke was in 1828

Dictionary Entries Near upstroke

Cite this Entry

“Upstroke.” Dictionary, Merriam-Webster, Accessed 5 Dec. 2022.

Kids Definition



up·​stroke ˈəp-ˌstrōk How to pronounce upstroke (audio)
: an upward stroke (as of a pen)
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