defaultprogram
nounUK /dɪˈfɔːlt ˈprəʊɡræm/
US /dɪˈfɔːlt ˈproʊɡræm/
A default program is the app that opens a file by itself when you click it.
My computer uses the photo app as the default program for pictures.
RELATED WORDS
OTHER MEANINGS
2. The software a system picks automatically when no other choice is made.
If you don't choose a browser, the default program will open your links.
3. A pre-set tool that runs when a device starts up.
The default program launches as soon as the tablet turns on.
4. The usual app assigned to handle a certain kind of file.
You can change the default program for music files in the settings.