The phrase "default value" refers to a pre-set value that is automatically used if no other value is specified. It is like a backup option that is chosen by default when someone doesn't make a specific choice or selection. Full definition
This enables a result for specific space heat demand to be calculated quickly using default values, potentially saving significant time. (designph.org)
Most of these parameters have default values suitable for news enthusiasts who simply want to subscribe to a full - text feed in their news reading application. (fivefilters.org)