What does "shortwave" mean?

An electromagnetic wave having a wavelength between approximately 10 and 100 meters, corresponding to frequencies between 3 and 30 MHz.

What is a synonym for "shortwave"?

Common synonyms include: audio-frequency, beam, broadcast, carrier, carrier wave, decameter wave.

Pronounced //ˈʃɔːtˌweɪv//.

//ˈʃɔːtˌweɪv// adj, noun, slang

adj, noun, slang ·Moderate ·High school level

Noun

1
An electromagnetic wave having a wavelength between approximately 10 and 100 meters, corresponding to frequencies between 3 and 30 MHz.
"Shortwaves are longer than microwaves."
2
Any frequency in this range, especially when used in broadcasting. colloquial, plural-normally
"Many stations broadcast on shortwaves."
3
Downward radiation entering the earth's atmosphere that is in the shortwave frequency range.
"Some doubt is cast on the quality of the shortwave fadeout data during the early part of the period considered."

Adjective

1
Having a wavelength of approximately 10 to 100 meters. not-comparable
2
Capable of transmitting or receiving signals at such a wavelength. not-comparable