mail flag

noun Nautical.

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

Nearby words

  1. mail,
  2. mail bomb,
  3. mail car,
  4. mail carrier,
  5. mail drop,
  6. mail merging,
  7. mail order,
  8. mail-cheeked,
  9. mail-in,
  10. mail-order Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019