Synonyms

foundational

American

[foun-dey-shuh-nl] / faʊnˈdeɪ ʃə nl /

Rarely foundationary

adjective

of or relating to the basis or groundwork on which something rests or is built; needing to be understood or established at the beginning.

We believe that fostering a strong local community is a foundational component of our inner-city scholarship program, guiding everything else we do.

Other Word Forms

foundationally adverb

Etymology

Origin of foundational

foundation ( def. ) + -al ¹ ( def. )

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.

“Earnings momentum remains intact, and Q1 reports could provide some foundational support for equities,” said Anthony Saglimbene, chief market strategist at Ameriprise.

From Barron's • Apr. 7, 2026

Donald Trump’s executive order to promote AI in schools argued that the tech “sparks curiosity and creativity” and “will equip our students with the foundational knowledge and skills.”

From Salon • Mar. 30, 2026

The researchers see it as a foundational design that could eventually be developed into practical tools for clinical and laboratory use.

From Science Daily • Mar. 25, 2026

With all its horrors, the Iran-Iraq war also created the foundational myth of the Islamic Republic, cementing its power for the ensuing decades.

From The Wall Street Journal • Mar. 21, 2026

In this sense, statistics is to probability as engineering is to physics—an applied science based on a more intellectually stimulating foundational discipline.

From "Innumeracy: Mathematical Illiteracy and Its Consequences" by John Allen Paulos

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023