interline

¹ American  

[in-ter-lahyn] / ˌɪn tərˈlaɪn /

verb (used with object)

interlined, interlining

1. to write or insert (words, phrases, etc.) between the lines of writing or print.

2. to mark or inscribe (a document, book, etc.) between the lines.

3. to transfer (freight) from one carrier to another in the course of shipment.

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verb (used without object)

interlined, interlining

1. to transfer freight from one carrier to another in the course of shipment.

adjective

1. involving or indicating a transfer of passengers or freight from one carrier to another during travel or shipment.

   interline flights.

2. of or relating to transactions between competing carriers, especially airlines, by which passengers, baggage, and freight are transferred from one carrier to another using only one ticket or one check-in procedure from departure point to destination.

interline ² American  

[in-ter-lahyn] / ˈɪn tərˌlaɪn /

verb (used with object)

interlined, interlining

1. to provide (a garment) with an interlining.

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interline ¹ British  

/ ˌɪntəˈlaɪn, ˌɪntəˈlɪnɪˌeɪt /

verb

1. (tr) to write or print (matter) between the lines of (a text, book, etc)

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interline ² British  

/ ˌɪntəˈlaɪn /

verb

1. (tr) to provide (a part of a garment, such as a collar or cuff) with a second lining, esp of stiffened material

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Other Word Forms

• interliner noun
• interlining noun

Etymology

Origin of interline¹

First recorded in 1350–1400; Middle English word from Medieval Latin word interlīneāre. See inter-, line ¹

Origin of interline²

First recorded in 1470–80; inter- + line ²

Example Sentences

The application, filed on Friday, said the merger would boost competition, streamlining pricing of interline moves for thousands of customer locations.

From The Wall Street Journal • Dec. 19, 2025

Charles Leocha, president of Travelers United, a nonprofit passenger advocacy group, agrees, saying: “I would like to see more interline agreements. That would be a big help.”

From Los Angeles Times • Aug. 26, 2022

“When this happens, we work hard with our interline partners to connect customers with their bags as quickly as possible, including compensation for the delayed bag. We sincerely apologize for the frustration this caused.”

From New York Times • Jul. 29, 2022

Alaska said it has also suspended its limited interline relationships with S7 and Aeroflot, the largest carrier in Russia.

From Seattle Times • Mar. 1, 2022

After each of these, for honor or dishonor, we interline the name of Isabella.

From Great Men and Famous Women. Vol. 3 A series of pen and pencil sketches of the lives of more than 200 of the most prominent personages in History by Horne, Charles F. (Charles Francis)

Related Words

• cover
• fill
• stuff