Definition of underline in English:

underline

Line breaks: under|line

verb

Pronunciation: /ʌndəˈlʌɪn
 
/
[with object]
  • 1Draw a line under (a word or phrase) to give emphasis or indicate special type: certain phrases had been underlined
    More example sentences
    • Copy the articles or excerpts by hand underlining those words and phrases that you think are significant in the creation of mood and/or atmosphere.
    • Please indicate italics by underlining and indicate boldface by drawing a wavy line beneath the affected characters.
    • For some that meant moving from writing each idea on a separate line to using headers and underlining vocabulary words.
    Synonyms
    underscore, mark, pick out, emphasize, highlight; italicize
  • 1.1Emphasize (something): the improvement in retail sales was underlined by these figures
    More example sentences
    • Nevertheless, the sale seemed to underline their minor status.
    • The television figures underline the sustained popularity of the annual broadcasts from the festival and this year's programme attracted over 56 per cent of the Irish audience at its peak.
    • These figures underline the fact that we are in the great boom in advertising for years, much greater than anything seen in 1999-2000.
    Synonyms
    emphasize, give emphasis to, stress, put/lay stress on, highlight, accentuate, accent, call/draw attention to, focus (attention) on, zero in on, spotlight, throw into relief, give prominence to, bring to the fore, foreground, bring home, point up, play up, make a feature of
    informal rub in

noun

Pronunciation: /ˈʌndəlʌɪn
 
/
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  • 1A line drawn under a word or phrase, especially for emphasis: sub-headings have an underline in blue
    More example sentences
    • That last sentence has a green underline on my word processor, and when I right click to see what grammatical snafu I've made, it says ‘Wordiness.’
    • Take this familiar experience: spell a word wrongly in your word processor and you see a wavy red underline appear under the word.
    • I don't think the problem is the color, the problem is the highlighting as opposed to an underline.
  • 2The line of the lower part of an animal’s body: she has a white tail and underline

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