underline

From under- +‎ line.

• (General American) IPA^(key): /ˈʌndɚˌlaɪn/
• (Received Pronunciation) IPA^(key): /ˈʌndəˌlaɪn/

• Audio (US):

  (file)

• (General American, alternative pronunciation of the verb) IPA^(key): /ˌʌndɚˈlaɪn/
• (Received Pronunciation, alternative pronunciation of the verb) IPA^(key): /ˌʌndəˈlaɪn/
• Rhymes: -aɪn (for alternative pronunciation of the verb)

underline (plural underlines)

1. A line placed underneath a piece of text in order to provide emphasis or to indicate that it should be viewed in italics or (in electronic documents) that it acts as a hyperlink.
2. (uncommon) The character _.

   Synonyms: underscore, low line

3. (dated) An announcement of a theatrical performance to follow, placed in an advertisement for the current one.
4. (dated) A caption beneath a photograph (which may have more than one line of text).
   • 1944 May and June, “Notes and News: The Most Powerful 0-6-0”, in Railway Magazine, page 186:

     Several readers [...] write to point out that the ex-Great Eastern 0-6-0s now classified as "J20" in the L.N.E.R. lists, no longer hold the supremacy for power among British 0-6-0 locomotives as suggested in the underline to the photograph of one of them which appeared on p. 100 of the March-April issue.

underline (third-person singular simple present underlines, present participle underlining, simple past and past participle underlined)

1. To draw a line underneath something, especially to add emphasis.

   Synonym: underscore

   Coordinate terms: bold, boldface, embolden, italicize, strike through

   underline the important words in the text

2. (figuratively) To emphasise or stress something.
   • 2011 December 10, Marc Higginson, “Bolton 1 - 2 Aston Villa”, in BBCSport‎:

     The Midlanders will hope the victory will kickstart a campaign that looked to have hit the buffers, but the sense of trepidation enveloping the Reebok Stadium heading into the new year underlines the seriousness of the predicament facing Owen Coyle's men.

3. (figurative, obsolete) To influence secretly.
   • 1642, Henry Wotton, The Life and Death of the Duke of Buckingham:

     By mere chance in appearance, though underlined with a providence, they had a full light of the infanta.

underline (not comparable)

1. Passing under a railway line.

   Coordinate terms: at-grade, overgrade, undergrade

   • 1950, Leonora Fry, C. W. Huxtable, Get to know: British railways, page 26:

     Just as it was sometimes necessary to lower the road to take it beneath an underline bridge, so in this case it might be necessary to raise it.

   • 1960 June, Cecil J. Allen, “Locomotive Running Past and Present”, in Trains Illustrated, page 369:

     A minute was saved by smart working at Ipswich, but soon after came yet another delay, a 10 m.p.h. slack over an underline bridge being reconstructed between Bramford and Claydon.

   • 1979 August, Michael Harris, “A line for all reasons: the North Yorkshire Moors Railway”, in Railway World, page 412:

     As to underbridges, the policy is to wait until the small underline bridges become due for renewal when they will be replaced by prestressed concrete structures.

• underline on Wikipedia.Wikipedia

Typography

• unlinered

Unadapted borrowing from English underline.

underline m (plural underlines)

1. underscore (name of the character _)
   • 2008, Flavia Reisswitz, Análise de Sistemas Vol. 3, Clube de Autores, page 10:

     Como uma última precaução, não podemos usar espaços, pois o compilador pode entender como sendo outra váriavel não separada por vírgula e acusará um erro. No lugar do espaço, pode-se usar underline (_).

     (please add an English translation of this quotation)