boundary layer

noun Physics.

the portion of a fluid flowing past a body that is in the immediate vicinity of the body and that has a reduced flow due to the forces of adhesion and viscosity.

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Origin of boundary layer

First recorded in 1920–25

Words nearby boundary layer

bound up in, bound variable, boundary, boundary commission, boundary condition, boundary layer, boundary line, boundary peak, boundary rider, boundary value problem, bounded
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for boundary layer

boundary layer

noun

the layer of fluid closest to the surface of a solid past which the fluid flows: it has a lower rate of flow than the bulk of the fluid because of its adhesion to the solid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012