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Longman Dictionary of Contemporary English
on-air
adjective
EXAMPLES FROM CORPUS
▪ Despite the model looks and on-air poise, the most striking quality of this thirtysomething television journalist is her name.
▪ Hilary explains how she deals with on-air technical problems.
▪ Last fall, Winfrey decided to give fiction a boost by creating her on-air book club.
▪ Networks are making heavy profits from news, and on-air talent is being paid more than ever to communicate to the public.
▪ No on-air promotion is allowed on any of our independently commissioned or distributed titles.
▪ On weekends, this connoisseur of contemporary language stations himself on the couch, clicker in hand, riding the on-air waves.
▪ Pahdra Singh handled his on-air interview brilliantly, and pointed out to Labone that grandstands are not insured against theft.
▪ The on-air weather person is expected to draw audiences, not weather maps.
Wiktionary
on-air

a. broadcast (as opposed to recorded). adv. Actually broadcasting on a radio or television station (as opposed to just recording for later transmission).

Usage examples of "on-air".

At a nod from Minh, he began, having allowed for an introduction to be written later, which would precede the on-air showing.

After all that I'm still a line producer, no on-air anything, doing the same job they're giving to twenty-two-year-old bimbos fresh out of school.

The story was shaped by the producer, and narrated by the on-air star, who flew in for a single day, did the stand-ups and the major interviews, and then flew on to the next shoot, leaving the producer to cut the tape.

The success of that first on-air visit led to regular appearances on the program, and when Marge moved on to host a television program, Susan was invited to replace her on the daily radio talk show.