underline
Americanverb (used with object)
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to mark with a line or lines underneath; underscore.
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to indicate the importance of; emphasize, as by stressing or italicizing.
noun
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Printing. a caption under an illustration.
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a line drawn under something; an underscore.
verb
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to put a line under
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to state forcibly; emphasize or reinforce
noun
Other Word Forms
Etymology
Origin of underline
Vocabulary lists containing underline
Language and Grammar - Introductory
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Language and Grammar - Middle School
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Reading: Informational - Introductory
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
I underline that — magnificent Canada — because I’d like to be an honorary citizen.
From Los Angeles Times • May 7, 2026
Hong Kong benefits from the recovery of China as a tourism destination, while the conflict in the Middle East underline the importance of safety and stability for financial centers.
From The Wall Street Journal • May 5, 2026
Josh Bivens, the chief economist at the Economic Policy Institute, pointed to Federal Reserve data to underline the discrepancy between the tariffs Americans have paid versus the refunds they are seeing this year.
From Salon • Apr. 15, 2026
Another victory next weekend would underline how much City have grown - and further strengthen their title credentials.
From BBC • Apr. 12, 2026
He proceeded to underline the historic significance of the occasion and discuss the need for overcoming mutual distrust.
From "Long Walk to Freedom" by Nelson Mandela
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
