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underpinning
The definition of an underpinning is a system of support.
(noun)An example of underpinning is the foundation of a house.
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See underpinning in Webster's New World College Dictionary
noun
- a supporting structure or foundation, esp. one placed beneath a wall
- a support or prop
- ☆ Informal the legs
See underpinning in American Heritage Dictionary 4
noun
- Material or masonry used to support a structure, such as a wall.
- A support or foundation. Often used in the plural.
- Informal The human legs. Often used in the plural.
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