1. radio waves with frequencies between about 3 and 30 megahertz, used for long-distance communication
2. a radio that receives shortwave broadcasts

1. relating to or using shortwave radio frequencies

Examples

• The shortwave broadcast could be heard across continents.
• He tuned his shortwave radio to listen to international news.
• Shortwave frequencies are ideal for long-distance communication.
• The old shortwave in the attic still picks up foreign stations.
• Amateur radio operators often use shortwave bands.
• Shortwave transmissions can bounce off the ionosphere.
• She bought a portable shortwave for camping trips.