American Heritage
Science Dictionary
boundary condition   (boun'də-rē)  Pronunciation Key 
Mathematics
The set of conditions specified for the behavior of the solution to a set of differential equations at the boundary of its domain. Boundary conditions are important in determining the mathematical solutions to many physical problems.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
To provide the initial and lateral boundary condition files by interpolating
  larger scale model data to the domain.
The implementation of this boundary condition is primarily aimed at simulating
  infiltration on land surface with possible ponding.
Of particular interest in applications is the free surface boundary condition,
  where the normal stress is set to zero.
The internal boundary condition includes only two flow-path end nodes in this
  case.
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