underlying

adjective

un·​der·​ly·​ing ˌən-dər-ˈlī-iŋ How to pronounce underlying (audio)
1
a
: lying beneath or below
the underlying rock is shale
b
: basic, fundamental
an investigation of the underlying issues
2
: evident only on close inspection : implicit
3
: anterior and prior in claim
underlying mortgage
4
: of or being present in deep structure
underlying word order

Examples of underlying in a Sentence

the ocean and the underlying rock the underlying differences between democracy and dictatorship
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.
In this manner, the patterning is more robust and incorporates that what is asked and what is answered are related to the underlying logic that was employed. Lance Eliot, Forbes, 10 Mar. 2025 Treasuries have been around for a long time, but their underlying purpose is debatable at best. Dp Opinion, The Denver Post, 10 Mar. 2025 In some cases, a person may have been susceptible to developing lung fibrosis due to an underlying condition and the COVID-19 infection may accelerate the fibrotic progression. Amy McGorry, Fox News, 8 Mar. 2025 Last month, Texas announced the outbreak’s first death, a school-age child who was not vaccinated, had no underlying conditions and had been hospitalized. Neha Mukherjee, CNN, 7 Mar. 2025 See All Example Sentences for underlying

Word History

First Known Use

1611, in the meaning defined at sense 1a

Time Traveler
The first known use of underlying was in 1611

Browse Nearby Words

Cite this Entry

“Underlying.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/underlying. Accessed 13 Mar. 2025.

Kids Definition

underlying

adjective
un·​der·​ly·​ing ˌən-dər-ˌlī-iŋ How to pronounce underlying (audio)
1
: lying under or below
the underlying rock
2

Medical Definition

underlying

adjective
un·​der·​ly·​ing -ˌlī-iŋ How to pronounce underlying (audio)
: serving as a basis or cause (as of secondary symptoms)
the underlying brain malformation that caused the hydrocephalusR. M. Henig

More from Merriam-Webster on underlying

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!