'backgrounding' definitions:

Definition of 'backgrounding'

From: WordNet
noun
The execution of low priority programs while higher priority programs are not using the processing system [syn: background processing, backgrounding]

Definition of 'backgrounding'

From: GCIDE
  • backgrounding \back"ground*ing\ n. (Computers) The execution of low priority programs while higher priority programs are not using the processing system.
  • Syn: background processing [WordNet 1.5]