underlie

verb

un·​der·​lie ˌən-dər-ˈlī How to pronounce underlie (audio)
Synonyms of underlienext

transitive verb

1
: to lie or be situated under
2
: to be at the basis of : form the foundation of : support
ideas underlying the revolution
3
: to exist as a claim or security superior and prior to (another)
4
archaic : to be subject or amenable to

Examples of underlie in a Sentence

A tile floor underlies the rug. The river is underlain by limestone. We discussed the principles that underlay their methods. A theme of revenge underlies much of her writing.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Without the structure of constant checkups and immediate attention to injuries, some former players may delay seeing providers — allowing underlying health issues to go unaddressed for years. Roni Robbins, AJC.com, 21 Apr. 2026 There was an underlying tone of contrition. Armando Salguero, FOXNews.com, 21 Apr. 2026 But alongside that commitment is an underlying uncertainty — if something goes wrong, will they be treated fairly? Rep. Nick Menapace, Hartford Courant, 21 Apr. 2026 The underlying problems, meanwhile, remain unsolved. Nataliya Gumenyuk, The Dial, 21 Apr. 2026 See All Example Sentences for underlie

Word History

First Known Use

before the 12th century, in the meaning defined at sense 4

Time Traveler
The first known use of underlie was before the 12th century

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Cite this Entry

“Underlie.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.grautoblog.com/dictionary/underlie. Accessed 26 Apr. 2026.

Kids Definition

underlie

verb
un·​der·​lie ˌən-dər-ˈlī How to pronounce underlie (audio)
underlay -ˈlā How to pronounce underlie (audio) ; underlain -ˈlān How to pronounce underlie (audio) ; underlying -ˈlī-iŋ How to pronounce underlie (audio)
1
: to lie or be located under
2
: to form the foundation of : support
ideas underlying the revolt

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