foundation

American  

[foun-dey-shuhn] / faʊnˈdeɪ ʃən /

noun

1. the basis or groundwork of anything.

   the moral foundation of both society and religion.

2. the natural or prepared ground or base on which some structure rests.

   Synonyms:

   footing

   Antonyms:

   superstructure

3. the lowest division of a building, wall, or the like, usually of masonry and partly or wholly below the surface of the ground.

   Synonyms:

   footing

   Antonyms:

   superstructure

4. the act of founding, setting up, establishing, etc..

   a policy in effect since the foundation.

   Synonyms:

   settlement, establishment

5. the state of being founded.

   Synonyms:

   settlement, establishment

6. an institution financed by a donation or legacy to aid research, education, the arts, etc..

   the Ford Foundation.

7. an endowment for such an institution.

8. a cosmetic, as a cream or liquid, used as a base for facial makeup.

9. foundation garment.

10. Solitaire. a card of given denomination on which other cards are to be added according to denomination or suit.

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foundation British  

/ faʊnˈdeɪʃən /

noun

1. that on which something is founded; basis

2. (often plural) a construction below the ground that distributes the load of a building, wall, etc

3. the base on which something stands

4. the act of founding or establishing or the state of being founded or established

5. 1. an endowment or legacy for the perpetual support of an institution such as a school or hospital

   2. entitled to benefit from the funds of a foundation

6. an institution supported by an endowment, often one that provides funds for charities, research, etc

7. the charter incorporating or establishing a society or institution and the statutes or rules governing its affairs

8. a cosmetic in cream or cake form used as a base for make-up

9. See foundation garment

10. cards a card on which a sequence may be built

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Related Words

See base ¹.

Other Word Forms

• foundational adjective
• foundationally adverb
• foundationary adjective
• prefoundation noun

Etymology

Origin of foundation

First recorded in 1350–1400; Middle English foundacioun, from Latin fundātiōn- (stem of fundātiō ), equivalent to fundāt(us) (past participle of fundāre; see found ¹) + -iōn- -ion

Explanation

A foundation is the base for something. You often hear about the structural foundations of buildings, but a good idea can also be the foundation of a successful business. In the simplest sense, foundations support something else. Friendship is the foundation of a good marriage, and many svelte figures rely on girdles (known to underwear specialists as a foundation garment). But foundations are also charitable organizations. And in cosmetics, foundation is gooey make-up that's supposed to match your skin tone.

Example Sentences

Management said hospital access accelerated in March, which Citi views as a solid foundation for sales growth in 2026, while new product approvals this year could provide additional upside.

From The Wall Street Journal • Apr. 24, 2026

The start-up works with several federal research centers including Idaho National Laboratory, where it is laying the foundation for its first commercial nuclear facility, dubbed Aurora.

From Barron's • Apr. 23, 2026

After finishing the London Marathon last year, Sergio decided to do six of the world's major marathons in 12 months for the foundation he set up in his daughter's name, Alice's WonderDance.

From BBC • Apr. 23, 2026

Poverty is making people sick, and affordability is the foundation upon which we can build healthier communities.

From MarketWatch • Apr. 23, 2026

She uses a dry, tough thread for foundation lines, and she uses a sticky thread for snare lines—the ones that catch and hold insects.

From "Charlotte's Web" by E.B. White

Related Words

• association
• charity
• company
• corporation
• endowment
• establishment
• institute
• organization
• society