radio silence meaning

• [Defence]
  (*) A condition in which all or certain radio equipment capable of radiation is kept inoperative.
  (DOD only) (Note: In combined or United States Joint or intra-Service communications the frequency bands and/or types of equipment affected will be specified.
  )

• silence:    Noun: silence  ...
• break silence:    [American slang]to ...
• break the silence:    [American slang]to ...

Examples

1. but engineers are exploring other possible reasons for the radio silence
2. if the station that is in radio silence state need communicate with other station, it must turn to communication state
3. "All missions were flown with radio silence to avoid detection.
4. She drifted for three days maintaining radio silence before requesting assistance.
5. He later wrote about the experience for the magazine Radio Silence.