simultaneousrunning
nounUK /ˌsɪməlˈteɪniəs ˈrʌnɪŋ/
US /ˌsaɪməlˈteɪniəs ˈrʌnɪŋ/
Running at the same time as something else.
The simultaneous running of two races made the park very busy.
OTHER MEANINGS
2. Running two or more computer programs at the same time.
Simultaneous running of several apps slowed the old laptop.
3. Happening together at the same moment.
The simultaneous running of the events confused the spectators.
4. Operating machines or processes in parallel.
Simultaneous running of the generators kept the power steady.