Definition, Meaning & Synonyms

penumbra

noun
/pəˈnəmbrə/
Definition
A partial shadow or an area of partial illumination.
Examples
  • During the eclipse, the moon cast a penumbra that created a beautiful twilight effect.
  • The penumbra of the lamp provided just the right amount of light for reading.
Meaning
The term refers to the transition zone between light and shadow, especially during an eclipse.
Synonyms
  • shadow
  • shade
  • half-light