• WordNet 3.6
    • v underline draw a line or lines underneath to call attention to
    • v underline give extra weight to (a communication) "Her gesture emphasized her words"
    • n underline a line drawn underneath (especially under written matter)
    • ***
Webster's Revised Unabridged Dictionary
    • Underline Emphasize or call attention to; highlight; as, Long waits at the emergency room underline the need for a larger hospital. "."
    • Underline To influence secretly.
    • Underline To mark a line below, as words; to underscore.
    • ***
Century Dictionary and Cyclopedia
    • n underline The lower line of the body: used in describing the “points” of a horse.
    • underline To mark underneath or below with a line; underscore: as, to underline words in a letter.
    • underline To influence secretly.
    • n underline The advance announcement of the production of a play, placed under any theatrical advertisement of a regular performance.
    • ***
Chambers's Twentieth Century Dictionary
    • v.t Underline un-dėr-līn′ to draw a line under or below, as a word
    • n Underline an announcement of a theatrical performance to follow placed in an advertisement of the present one
    • ***


In literature:

Don't emphasize and underline for her.
"Play the Game!" by Ruth Comfort Mitchell
She naturally underscored the words "at once," forgetting for the moment that, in telegraphy, a word underlined counts as two words.
"Post Haste" by R.M. Ballantyne
Refusing to receive Senator Stone, he sent him a letter in which the cardinal points of his position were underlined.
"Woodrow Wilson and the World War" by Charles Seymour
If she was to go on (she underlined it) she must be left absolutely alone.
"The Flaw in the Crystal" by May Sinclair
Underline it with red pencil!
"A Nest of Spies" by Pierre Souvestre
Prohibition does not produce drunkenness, but it reveals it, underlines it.
"In Times Like These" by Nellie L. McClung
Byfield replaced it and underlined his disgust with a kick.
"The Works of Robert Louis Stevenson - Swanston Edition Vol. 20 (of 25)" by Robert Louis Stevenson
This term emphasizes the Feast-aspect, as "Altar" underlines the Sacrificial aspect, of the Sacrament.
"The Church: Her Books and Her Sacraments" by E. E. Holmes
The "immediately" was underlined three times.
"'Jena' or 'Sedan'?" by Franz Beyerlein
The last paragraph was underlined.
"On the right of the British line" by Gilbert Nobbs

In poetry:

Grishkin is nice: her
Russian eye is underlined for emphasis;
Uncorseted, her friendly bust
Gives promise of pneumatic bliss.
"Whispers Of Immortality" by T S Eliot
Look deeper still. Dost underline
Most words in writing letters?
Or "Local" write on envelopes?
Say, ere I bind my fetters.
Let no false pity spare the blow, but in true mercy tell me so.
"Myrtilla's Third Degree" by Franklin Pierce Adams

In news:

Aigners' Holocaust memories underline value of eyewitness accounts.
Debacle May Underline Case For Volcker Rule.
Clashes Ease in Cairo, but Underline Nation's Fragile Condition.
UF&D to Underline Performance at Heimtextil.
UF&D to underline performance at Heimtexil.
Gowanus Canal Inquiry Underlines Severity of Pollution.
2 Kerry Votes on War and Peace Underline a Political Evolution.
Tributes to Nixon Underline Triumphs, Not the Downfall.
After the local election results underlined just how far the Government has fallen in recent months, this feels like a crossroads for politics in Britain.
GOP race underlines state divisions.
Underlined words are proposed new language.
Our support for them underlines the crucial role The Trib plays in our community: providing an independent and well-balanced perspective on the issues that concern all of us.
The Value of Greenfree Underlined By Prestigious Golf Course Rankings.
Morgan Deal Underlines The New Capital Flow.
Prisoners' labor underlines hypocrisy .

In science:

Let us underline that the active particles do not interact with each other and there is no “one-particle-per-site” rule.
The shape theorem for the frog model with random initial configuration
The non basic factors have been underlined).
Minimum aberration designs of resolution III
Assume that all vertices not in italics and underlined are arc vertices of G.
Obtaining hamilton cicuits in graphs and digraphs
More recently, Fridman et al. (2001) used the observed velocity information to reconstruct the velocity field of NGC 3631, and they underlined the important role of the m = 1 and m = 3 coefficients.
On the Spiral Structure of NGC 2915 and Dark Matter
This directly results from the point underlined just above, i.e. a rotating star enters the WR phase still with a large H– rich envelope.
Stellar evolution with rotation X: Wolf-Rayet star populations at solar metallicity