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Definition of "surface" []

  • The outer or the topmost boundary of an object. (noun)
  • A material layer constituting such a boundary. (noun)
  • Mathematics The boundary of a three-dimensional figure. (noun)
  • Mathematics The two-dimensional locus of points located in three-dimensional space. (noun)
  • Mathematics A portion of space having length and breadth but no thickness. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "surface" in a sentence
  • "In a nutshell, about 2% of surface of continental US is “paved surface” – roofs, parking lots, factories, shopping malls, roads, etc."
  • "In the polar regions, therefore, the momentum of the surface air preponderates, and, in this case, the _surface_ current is towards the equator, and the upper current towards the poles."
  • "[grund] sele, 2140. grund-wang, st. m., _ground surface, lowest surface_: acc.sg. þone grund-wong (_bottom of the sea_), 1497; (bottom of the drake's cave), 2772,"