boundary layer

noun

Definition of boundary layer 

: 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

The forecast called for more on and off snow showers through the early afternoon and the focus was along the lakefront because of boundary layer convergence and the influence of a northeast wind off the lake,’’ Scott said. David Haugh, chicagotribune.com, "Snow job? Cubs postpone while White Sox play — and both teams made right call," 9 Apr. 2018 The ability to fly low in a hurricane reveals details about the engine of a hurricane: the boundary layer where warm evaporating water energizes the clouds above. Joe Pappalardo, Popular Mechanics, "NOAA's Revolutionary Hurricane-Hunting Drone Program Is Broke," 2 Oct. 2017 The boundary layer also makes them unsuited for desert climates, where the insulation puts them at risk of daytime overheating. Jason Daley, Smithsonian, "Why Are Some Leaves Massive and Others Minuscule?," 1 Sep. 2017

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

See More

First Known Use of boundary layer

1921, in the meaning defined above

Keep scrolling for more

Learn More about boundary layer

Share boundary layer

Statistics for boundary layer

Look-up Popularity

Time Traveler for boundary layer

The first known use of boundary layer was in 1921

See more words from the same year

More from Merriam-Webster on boundary layer

Britannica.com: Encyclopedia article about boundary layer

Comments on boundary layer

What made you want to look up boundary layer? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

one that holds something together

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!