transitive verb. : to insert between lines already written or printed. interline. verb (2) interlined; interlining; interlines.

What interlining means?

: a lining (as of a coat) sewn between the ordinary lining and the outside fabric.

What does interline writing mean?

to write or insert (words, phrases, etc.) between the lines of writing or print. to mark or inscribe (a document, book, etc.) between the lines.