The definition of a penumbra is the lighted area around the shadow of a planet or moon during an eclipse.
Dark shadows gathering at dusk:
Foliage, considered as shade-giving
The pathway or route of such illumination to a person:
Find another word for umbra. In this page you can discover 5 synonyms, antonyms, idiomatic expressions, and related words for umbra, like: penumbra, shade, shadow, umbrage and light.