When a program is shown on two TV channels at the same time, or simultaneously on TV and radio, that's a simulcast. Another kind of simulcast is a live broadcast.

You can call a station's broadcast of the Superbowl or the Academy Awards a simulcast, although this is a newer way to use this word. It was coined in the 1940s, during the early days of television, from a portmanteau (or blend) of simultaneous and broadcast, specifically describing shows broadcast on radio and TV at the same time. If a concert is aired on two radio stations at once, that's also a simulcast.

Definitions of simulcast
  1. noun
    a broadcast that is carried simultaneously by radio and television (or by FM and AM radio)
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    type of:
    message that is transmitted by radio or television
Word Family

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