penumbra
📖 Definitions
noun
1. A surrounding area or fringe, a zone of influence or activity that is less distinct or certain.
2. A partly shaded region between fully dark and fully lit.
3. The diffuse area around the dark central area of a sunspot.
💬 Usage Examples
“If the mainstream debate is robust, its penumbra is toxic.” Arguing Over Iran; The Economist (London, UK); Sep 5, 2015.