Definitions
1.NounAn electromagnetic wave with a relatively short wavelength; specifically, one with a wavelength generally between 10 and 100 metres, corresponding to a frequency between 3 and 30 megahertz."Shortwaves are longer than microwaves.; Many stations broadcast on shortwaves."
2.NounDownward radiation in the shortwave (noun sense 1) frequency range which enters the Earth's atmosphere.
3.NounA waveband comprising radio waves in the shortwave (noun sense 1) frequency range, especially when used in broadcasting."Many stations broadcast on shortwaves."
4.NounA waveband comprising radio waves in the shortwave (noun sense 1) frequency range, especially when used in broadcasting."Many stations broadcast on shortwaves."
5.NounIn full shortwave radio: a radio which is able to receive radio waves in the shortwave (noun sense 1) waveband.
6.AdjectiveOf a radio wave: having a wavelength of between 10 and 100 metres, corresponding to a frequency between 3 and 30 megahertz.
7.AdjectiveOf radio equipment: capable of receiving or transmitting radio signals at wavelengths in the above range.
8.AdverbUsing radio waves having wavelengths of between 10 and 100 metres, corresponding to frequencies between 3 and 30 megahertz.