line. 1  linea alÂ´ba white line; the tendinous median line on the anterior abdominal wall between the two rectus muscles. 2  liÂ´neae albicanÂ´tes white or colorless lines on the abdomen, breasts, or thighs caused by mechanical stretching of the skin, with weakening of the elastic tissue; see also atrophic striae.
underwrite. v. 1) to agree to pay an obligation which may arise from an insurance policy. 2) to guarantee purchase of all shares of stock or bonds being issued by a corporation, including an agreement to purchase by the underwriter if the public does not buy all the shares or bonds.
Underscore. The underscore is a character that originally appeared on the typewriter and was primarily used to underline words. To produce an underlined word, the word was typed, the typewriter carriage was moved back to the beginning of the word, and the word was overtyped with the underscore character.iktionary (0.00 / 0 votes) Rate this definition: underscore (Noun). An underline; a line drawn or printed beneath text; the character. underscore (Noun). A piece of background music. underscore (Verb). To underline; to mark a line beneath text. underscore (Verb). To emphasize or draw attention to.