underline

1 of 2

verb

underlined; underlining; underlines

transitive verb

1
: to mark (something, such as a word) with a line underneath
2
: to put emphasis on : stress
3
: to show clearly or emphatically

underline

2 of 2

noun

un·​der·​line ˈən-dər-ˌlīn How to pronounce underline (audio)
1
: the outline of a quadruped's underbody
also : the ventral surface of a quadruped's body
2
: a horizontal line placed underneath something

Examples of underline in a Sentence

Verb His name was underlined in the book. The accident underlines our need for better safety procedures.
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.
Verb
Still, the Europeans underlined the importance of the moment. TIME, 6 Mar. 2025 Merz, Germany’s likely next chancellor, has seized the moment after the return of Donald Trump to the White House put the transatlantic alliance in turmoil and underlined the urgency for Europe to strengthen its own defenses. Reuters, CNN, 5 Mar. 2025
Noun
Events like these underline the evolving perception of cannabis as not just recreational but as a driver of economic and scientific progress. Matt Rozo, The Mercury News, 24 Feb. 2025 Also memorable is an earlier image while still in Hamburg, in Sarah’s apartment, where the passing trains through the window underline the overall feeling of transience. Jay D. Weissberg, Deadline, 19 Feb. 2025 See All Example Sentences for underline

Word History

First Known Use

Verb

1721, in the meaning defined at sense 1

Noun

1886, in the meaning defined at sense 1

Time Traveler
The first known use of underline was in 1721

Browse Nearby Words

Cite this Entry

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

Kids Definition

underline

verb
un·​der·​line
ˈən-dər-ˌlīn,
ˌən-dər-ˈlīn
1
: to draw a line under : underscore
2
underline
ˈən-dər-ˌlīn
noun

More from Merriam-Webster on underline

Last Updated: - Updated example sentences
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