Thesaurus.com
Dictionary.com
Definitions

underline

[uhn-der-lahyn, uhn-der-lahyn, uhn-der-lahyn] / ˈʌn dərˌlaɪn, ˌʌn dərˈlaɪn, ˈʌn dərˌlaɪn /
VERB
emphasize; mark
Synonyms
STRONGEST
accentuate highlight indicate point up stress underscore
STRONG
bracket caption feature italicize rule
WEAK
call attention to check off draw attention to give emphasis interlineate play up point to

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.

At early Coachella rehearsals, you could see a well-seasoned group working to underline its distinct cultural voice, while still delivering the exuberant pop it’s beloved for.

From Los Angeles Times • Apr. 9, 2026

Either choice would underline the FOMC’s independence from the president in a most striking manner.

From Barron's • Feb. 25, 2026

The results underline how widespread microplastic pollution has become, reaching even some of the most remote marine environments on Earth.

From Science Daily • Feb. 3, 2026

However, he knows might not earn any better opportunities to underline his place as the greatest player of all-time.

From BBC • Feb. 1, 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