— underlineation /un'deuhr lin'ee ay"sheuhn/ , n. — underliner , n.
v. /un"deuhr luyn', un'deuhr luyn"/ ; n. /un"deuhr luyn'/ , v. , underlined, underlining , n.
v.t.
1. to mark with a line or lines underneath; underscore.
2. to indicate the importance of; emphasize, as by stressing or italicizing.
n.
3. Print. a caption under an illustration.
4. a line drawn under something; an underscore.
[ 1715-25; UNDER- + LINE 1 ]