[ pi-nuhm-bruh ]
A partial shadow, as in an eclipse, between regions of complete shadow and complete illumination.
The diffuse outer part of a sunspot.
A partial lunar eclipse occurs when the Moon passes into the penumbra, or partial shadow.noun
An area in which something exists to a lesser or uncertain degree.noun
An outlying surrounding region; a periphery.
Well, consider the following penumbra of events that surround the current rumpus.