From Medieval Latin simultaneus, from simultim (“at the same time, extended”), from Latin simul (“together, at the same time”); compare similar.

Where does the word simultaneous come from?

The Latin root of simultaneous is simul, which also means "at the same time." One way to remember this word is to think of simulcast programs that are simultaneously available through different television networks, radio stations or Web sites — so you can catch that concert on TV while your friend is listening to it on ...

Why does simultaneously mean?

Simultaneously is defined as going on at the same time. If you are singing and dancing at the same time, this is an example of a situation where you are singing and dancing simultaneously. Occurring at the same time.