off air

• off-air (especially attributive)

off air

1. Not broadcasting or transmitting on radio or television.

   Channel 9 will be off air from 11 pm until 6 am.

   The transmitter is off air after a fire.

2. Not being, or so as not to be, broadcast or transmitted by radio or television.

   After ten years, the TV series was taken off air.

   Fortunately his offensive remarks were off air.

• off the air
• (of a TV or radio station that is shut down) dark, silent

• on air