foundational

adjective
foun·da·tion·al | \ fau̇n-ˈdā-shnəl , -shə-nᵊl \

Definition of foundational 

: of, relating to, or forming or serving as a base or foundation : fundamental foundational principles/doctrines These foundational volumes proved to be, each in its own way, enabling gestures for the growth of sophisticated theories and critical practices in African, Caribbean, and African American literatures. —Henry Louis Gates, Jr. Property was, in a sense, foundational to culture, since English political economy rested on the private ownership of land, and the political economy, in turn, largely structured social relations. —Jill Lepore Philosophy is a foundational discipline. Not only does it do the spadework that makes the construction of other disciplines possible; it also pays constant attention to the foundations of those disciplines as they are practiced.Cognitive Science

First Known Use of foundational

1657, in the meaning defined above

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The first known use of foundational was in 1657

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