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

“Now, if a carrier cancels a flight, you miss a funeral or a wedding, you are out of luck. With an interline agreement, consumers are not put in that untenable situation.”

From Los Angeles Times • Aug. 26, 2022

No commercial carriers from the United States fly to Russia, and those with code-share and interline agreements with Russian carriers, including Delta and American, have cut them.

From New York Times • Mar. 9, 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

If you make a mistake in a word, draw your pen through it, or score it so as to be quite illegible, and then interline the correction, placing a caret beneath.

From The Ladies' Guide to True Politeness and Perfect Manners or, Miss Leslie's Behaviour Book by Leslie, Eliza

Related Words

• cover
• fill
• stuff