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mail flag

American  

noun

Nautical.

  1. a flag of the International Code of Signals symbolizing the letter Y, flown alone by a ship to indicate that it is carrying mail: a square flag with red and yellow diagonal stripes.

  2. any of various other flags indicating that a ship is carrying mail.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Fourthly, we stated it to be highly desirable that the English Government should instruct their Commanders not to arrest steamers flying the German mail flag….

From Neutral Rights and Obligations in the Anglo-Boer War by Campbell, Robert Granville

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.