What does "background processing" mean?

The execution of a subsidiary operation by a computer while the user works with another application.

What is a synonym for "background processing"?

Common synonyms include: backgrounding.

noun

noun ·Rare ·Advanced level

Noun

1
The execution of a subsidiary operation by a computer while the user works with another application. uncountable
2
the execution of low priority programs while higher priority programs are not using the processing system wordnet

background + processing