Definition of "interline" in English

adjective

1. Between lines.

2. (transport) Between (or with) two airlines.

   • American Airlines and British Airways have an interline agreement to handle each other's baggage and to accept each other's tickets.
   • I had an interline connection from Delta to AA in Dallas/Ft. Worth.

verb

1. To write or insert between lines already written or printed, as for addition or correction.

   • to interline a page or a book

2. To arrange in alternate lines.

3. To imprint or mark with lines.