semaphore flag

noun

A flag used in semaphore. At sea, the flags are colored red and yellow (the Oscar flags), while on land, they are white and blue (the Papa flags).

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Meanings

nounsemaphore flag (plural semaphore flags)

plural semaphore flags

  1. A flag used in semaphore. At sea, the flags are colored red and yellow (the Oscar flags), while on land, they are white and blue (the Papa flags).
Cite this entry
APA

semaphore flag. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/semaphore%20flag

MLA

“semaphore flag.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/semaphore%20flag. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “semaphore flag,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/semaphore%20flag.

Source: semaphore flag on Wiktionary, CC BY-SA 4.0.