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Definition of underpinning - 5 dictionary results
Underpinning
Residential & commercial foundation repair products from Chance.
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HPS - Foundation Repair
Foundation Repair, Underpinning, Helical Piers, Dealer Opportunities
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un⋅der⋅pin⋅ning

  [uhn-der-pin-ing]
Use underpinning in a Sentence
–noun
1. a system of supports beneath a wall or the like.
2. Often, underpinnings. a foundation or basis: to uncover the emotional underpinnings of an illness.
3. underpinnings, Informal.
a. underwear, esp. women's underwear.
b. the legs.
Origin:
1480–90; under + pin + -ing 1
Underpinning
Residential & commercial foundation repair products from Chance.
www.abchance.com
HPS - Foundation Repair
Foundation Repair, Underpinning, Helical Piers, Dealer Opportunities
www.helicalpiersystems.com

un⋅der⋅pin

  [uhn-der-pin]
–verb (used with object), -pinned, -pin⋅ning.
1. to prop up or support from below; strengthen, as by reinforcing a foundation.
2. to replace or strengthen the foundation of (a building or the like).
3. to furnish a foundation for; corroborate: The author's conclusions are underpinned by references to experimental findings.
Origin:
1515–25; under- + pin
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To underpinning
un·der·pin   (ŭn'dər-pĭn')   
tr.v.   un·der·pinned, un·der·pin·ning, un·der·pins

  1. To support from below, as with props, girders, or masonry.

  2. To give support or substance to: "the public awareness that must underpin a sustained and concerted development effort for Africa and its youth" (Barber B. Conable).

un·der·pin·ning   (ŭn'dər-pĭn'ĭng)   
n.  

  1. Material or masonry used to support a structure, such as a wall.

  2. A support or foundation. Often used in the plural.

  3. Informal The human legs. Often used in the plural.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

underpinning 
1489, "action of supporting or strengthening from beneath," from under + pp. of pin (v.). Fig. sense of "prop, support" is recorded from 1589.
Online Etymology Dictionary, © 2001 Douglas Harper
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Helical Pile Systems
Helical Pile Installation For The New York, Connecticut and NJ Area.
www.FoundationStabilizers.com
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