Meaning of the word underly in English

What does underly mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

underly

US /ˌʌndərˈlaɪ/
UK /ˌʌndəˈlaɪ/

Verb

1.

to be the basis or foundation of (a theory, system, or belief)

Example:
The fundamental principles that underlie his philosophy are quite complex.
There are several assumptions that underlie this economic model.
2.

to lie or be located under (something)

Example:
The ancient ruins underlie the modern city.
A layer of clay underlies the topsoil.