From Wiktionary, the free dictionary
From non- + draggable.
nondraggable (not comparable)
- (computing) Not draggable.
1995, Jamie McCornack, Ingemar Ragnemalm, Paul Celestin, Tricks of the Mac game programming gurus, page 291:This game covers the whole screen with a single, nondraggable window, but the menu bar is visible and events are processed.