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Definitions

foundation

[foun-dey-shuhn] / faʊnˈdeɪ ʃən /
NOUN
basis for something physical or mental
Synonyms
STRONGEST
authority base bedrock groundwork infrastructure support
STRONG
ABCs basics bed bottom foot footing ground guts heart justification nitty-gritty nub prop reason root setup stay substratum substructure understructure
WEAK
bottom line brass tacks nuts and bolts underpinning
Antonyms
STRONG
cowardice exterior exteriority fear outside top
NOUN
established institution
Synonyms
STRONGEST
association charity company corporation endowment establishment institute organization society
STRONG
guild inauguration plantation settlement trusteeship

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

By combining learning with structured reasoning, it may provide a more efficient and dependable foundation for future AI systems.

From Science Daily • Apr. 5, 2026

Victoria Wylie came to the foundation for help in 2024, after she lost her son Alexander at 23 weeks.

From BBC • Apr. 5, 2026

Then Moore became coach, and Yohannes finally put in months of training to build a foundation.

From Los Angeles Times • Apr. 5, 2026

“We have to develop our own foundation models which are at the absolute frontier,” Suleyman said in a February interview External link with the Financial Times.

From Barron's • Apr. 4, 2026

So are all the other objects that were placed in the foundation.

From "The (Mostly) True Story of Cleopatra's Needle" by Dan Gutman

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.