Shortwave (noun)

A radio wave with a wavelength between 10 and 100 meters and a frequency of 3-30 megahertz, capable of being transmitted over long distances.

Origin:

Mid 19th century: short + wave.

Examples:

1. The shortwave radio is used to receive broadcasts from faraway countries.
2. The shortwave band is useful for communicating over long distances.
3. The shortwave transmission was disrupted by solar flares.
4. The shortwave signals were weak and difficult to receive.
5. The shortwave frequencies are used for international broadcasting.