Definition of foundation noun from the Oxford Advanced American Dictionary

        

    foundation

     noun
    noun
    NAmE//faʊnˈdeɪʃn//
     
     
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  1. 1[countable, usually plural] a layer of bricks, concrete, etc. that forms the solid underground base of a building The builders are now beginning to lay the foundations of the new school. The explosion shook the foundations of the houses nearby. Thesaurusbottombase foundation footThese are all words for the lowest part of something.bottom [usually sing.] the lowest part of something:Footnotes are given at the bottom of each page. I waited for them at the bottom of the hill.base [usually sing.] the lowest part of something, especially the part or surface on which it rests or stands:The lamp has a heavy base.foundation [usually pl.] a layer of bricks, concrete, etc. that forms the solid underground base of a building:to lay the foundations of the new schoolfoot [sing.] the lowest part of something:She waited for him at the foot of the stairs.bottom or foot?Foot is used to talk about a limited number of things: it is used most often with tree, hill/mountain, steps/stairs, and page. Bottom can be used to talk about a much wider range of things, including those mentioned above for foot.Patterns at/near/toward the bottom/base/foot of something on the bottom/base of something (a) firm/solid/strong base/foundation(s)
  2. 2[countable, uncountable] a principle, an idea, or a fact that something is based on and that it grows from Respect and friendship provide a solid foundation for marriage. The rumor is totally without foundation (= not based on any facts). These stories have no foundation (= are not based on any facts). Thesaurusbasisfoundation groundwork baseThese are all words for the ideas, facts, or work that something is based on.basis [usually sing.] a principle, an idea, or a fact that supports something and that it can develop from:This article will form the basis for our discussion.foundation [C, U] a principle, an idea, or a fact that supports something and that it develops from:Respect and friendship provide a solid foundation for marriage. The rumor is totally without foundation (= is not based on any facts).basis or foundation?Foundation is often used to talk about larger or more important things than basis:He laid the foundations of Japan's modern economy. These figures formed the basis of their claim for compensation.groundwork [U] work that is done as preparation for other work that will be done later:Her study laid the groundwork for my research.base [usually sing.] an idea, a fact, or a situation from which something is developed:This work provided us with a strong base upon which to build the company.Patterns a/the basis/foundation/groundwork/base for something a secure/solid/sound/strong/weak basis/foundation/base to form the basis/foundation/base of something to lay the foundation/groundwork for something to be without basis/foundation
  3. 3[countable] an organization that is established to provide money for a particular purpose, for example for scientific research or charity The money will go to the San Francisco AIDS Foundation.
  4. 4 [uncountable] the act of starting a new institution or organization synonym establishment The organization has grown enormously since its foundation in 1955. She used the money toward the foundation of a special research group.
  5. 5[uncountable] a skin-colored cream that is put on the face underneath other makeup
  6. Idioms
    shake/rock the foundations of something,shake/rock something to its foundations
     
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    to cause people to question their basic beliefs about something This issue has shaken the foundations of Louisiana politics.
See the Oxford Advanced Learner's Dictionary entry: foundation