A map or campaign without a mod component is seen as well below the baseline of what is possible with the engine, especially with the amount of documentation and examples available. Regardless of which description you find suitable, modding isn't just an encouraged activity among fans and developers of custom content, it's expected. A more stringent definition may include EUDs and any of the other myriad features provided by SCMDraft 2, a third-party map editor by SuicidalInsanity. For Starcraft, modding generally refers to anything that requires more than what the editors are capable of. Game modification ('modding') involves editing functions that are normally out of an end user's reach.
