[f. prec., after interlineation.] The action or result of underlining.

1

a. 1814.  Masquerade, I. i., in New Brit. Theatre, I. 223. It is like Italics in print, or underlineation in writing, and always means more than meets the ear.

2

1864.  Realm, 17 Feb., 2. This extract Mr. Cobden copied, with the due amount of underlineation.

3