international call sign

noun

A call sign assigned in accordance with the provisions of the International Telecommunications Union to identify a radio station. The nationality of the radio station is identified by the first or the first two characters. (When used in visual signaling, international call signs are referred to as “signal letters.”)

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Meanings

nouninternational call sign (plural international call signs)

plural international call signs

  1. governmentA call sign assigned in accordance with the provisions of the International Telecommunications Union to identify a radio station. The nationality of the radio station is identified by the first or the first two characters. (When used in visual signaling, international call signs are referred to as “signal letters.”)
Cite this entry
APA

international call sign. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/international%20call%20sign

MLA

“international call sign.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/international%20call%20sign. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “international call sign,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/international%20call%20sign.

Source: international call sign on Wiktionary, CC BY-SA 4.0.