La radiodifusión internacional es aquella que se dirige intencionalmente a una audiencia extranjera con propósitos ideológicos o de propaganda, preservación de lazos con las colonias o con los expatriados, promoción del turismo o mejorar la imagen externa de un país. Grupos religiosos se valen de la radiodifusión internacional para expandir sus creencias religiosas. Las emisoras internacionales suelen transmitir en varios idiomas para alcanzar un número mayor de oyentes. También ellas emplean las señales de intervalo.

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International broadcasting is broadcasting that is deliberately aimed at a foreign, rather than a domestic, audience. It usually is broadcast by means of longwave, mediumwave, or (more usually) shortwave radio, but in recent years has also used direct satellite broadcasting and the internet as means of reaching audiences. Although radio and television programs do travel outside national borders, in many cases reception by foreigners is accidental. However, for purposes of propaganda, transmitting religious beliefs, keeping in touch with colonies or expatriates, education, improving trade, increasing national prestige, or promoting tourism and goodwill, broadcasting services have operated external services since the 1920s.

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