# foundational

/faʊnˈdeɪʃənəɫ/ (US) · /faʊndˈeɪʃənəl/ (UK) · CEFR B2 · Adjective

Source: https://englishreference.com/word/foundational
Updated: 2026-05-09

## Definition

forming the base or starting point of something. It describes the most important ideas or facts that a larger system is built on.

For teachers: relating to the basis or groundwork of a system, theory, or structure. Often used to describe core principles or essential texts that support subsequent developments.

## Examples

- Reading and writing are foundational skills for every student.
- The professor argued that understanding basic physics is foundational to any career in engineering or architecture.
- The philosopher's early essays are considered foundational to modern ethics, providing the conceptual framework that later scholars would either expand upon or systematically challenge.

## Usage notes

- Typically used attributively before a noun; often pairs with 'principles', 'skills', or 'texts'.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.