Source : Webster's Revised Unabridged Dictionary (1913)

Interline \In`ter*line"\, v. t. [imp. & p. p. {Interlined}; p.
   pr. & vb. n. {Interlining}.] [Pref. inter- + line: cf. LL.
   interlineare, F. interlin['e]er, OF. entreligner.]
   1. To write or insert between lines already written or
      printed, as for correction or addition; to write or print
      something between the lines of; as, to interline a page or
      a book. --Swift.

   2. To arrange in alternate lines; as, to interline Latin and
      English. --Locke.

   3. To mark or imprint with lines.

            A crooked wrinkle interlines my brow. --Marlowe.

Interlining \In`ter*lin"ing\, n.
   Correction or alteration by writing between the lines;
   interlineation. --Bp. Burnet.