boundary layer
noun
: a region of fluid (such as air) moving relative to a nearby surface (such as that of an airplane wing) that is slowed by the viscosity of the fluid and its adhesion to the surface
Examples of boundary layer in a Sentence
Recent Examples on the Web
This configuration exploits the boundary layer of air flowing over the airframe to increase efficiency.
—
David Szondy
june 14,
New Atlas,
14 June 2026
And smoothness matters because the thin boundary layer of air clinging to the ball determines where the flow separates, how large a wake forms, and how much drag the ball experiences.
—
John Eric Goff,
The Conversation,
13 May 2026
In the dual frame construction, a boundary layer dividing the carbon fiber helps make the frame compression more resilient.
—
Tim Newcomb,
Forbes.com,
1 Apr. 2026
The first hint that something strange happened at the end of the Cretaceous period was the K-Pg boundary layer, a dark stripe of clay in the sedimentary rock record above which dinosaur fossils are absent.
—
Joanna Thompson,
Space.com,
18 Nov. 2025
See All Example Sentences for boundary layer
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David Szondy
june 14,
New Atlas,
14 June 2026
And smoothness matters because the thin boundary layer of air clinging to the ball determines where the flow separates, how large a wake forms, and how much drag the ball experiences.
—
John Eric Goff,
The Conversation,
13 May 2026
In the dual frame construction, a boundary layer dividing the carbon fiber helps make the frame compression more resilient.
—
Tim Newcomb,
Forbes.com,
1 Apr. 2026
The first hint that something strange happened at the end of the Cretaceous period was the K-Pg boundary layer, a dark stripe of clay in the sedimentary rock record above which dinosaur fossils are absent.
—
Joanna Thompson,
Space.com,
18 Nov. 2025
See All Example Sentences for boundary layer
Cite this Entry
“Boundary layer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/boundary%20layer. Accessed 5 Jul. 2026.
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