Definition from Wiktionary, the free dictionary
From Latin fundātiō.
foundation (plural foundations)
- The act of founding, fixing, establishing, or beginning to erect.
- The foundation of his institute has been wrought with difficulty.
- That upon which anything is founded; that on which anything stands, and by which it is supported; the lowest and supporting layer of a superstructure; groundwork; basis; underbuilding.
- (architecture) The lowest and supporting part or member of a wall, including the base course and footing courses; in a frame house, the whole substructure of masonry.
- The foundations of this construction have been laid out.
- 2012 May 20, Nathan Rabin, “TV: Review: THE SIMPSONS (CLASSIC): “Marge Gets A Job” (season 4, episode 7; originally aired 11/05/1992)”, The Onion AV Club:
- “Marge Gets A Job” opens with the foundation of the Simpson house tilting perilously to one side, making the family homestead look like the suburban equivalent of the Leaning Tower Of Pisa.
- A donation or legacy appropriated to support a charitable institution, and constituting a permanent fund; endowment.
- That which is founded, or established by endowment; an endowed institution or charity.
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- (cosmetics) Cosmetic cream roughly skin-colored, designed to make the face appear uniform in color and texture.
Derived terms 
act of founding
that upon which anything is founded
lowest and supporting part or member of a wall
legacy constituting a permanent fund of charitable institution
endowed institution or charity
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