Dictionary Entry
penumbra
nounFind the meaning of the word penumbra, plus dictionary definition, pronunciation, thesaurus-style synonyms, antonyms, and related vocabulary.
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Meaning
Dictionary meaning in a clear, student-friendly format.
The partially shaded outer region of a shadow, or the less dark part of a sunspot. It's where light is only partially blocked, creating a softer, less defined edge than the full shadow.
Example Sentence
During a solar eclipse, observers in the penumbra experience a partial obscuration of the sun, seeing only a portion of its light.
Usage Note
Use 'penumbra' to describe the lighter, outer part of a shadow, particularly in scientific contexts like astronomy when discussing eclipses or sunspots. It can also be applied metaphorically to describe a surrounding area of uncertainty or partial obscurity, such as the penumbra of a legal or ethical dilemma.
Antonyms
No antonyms have been added to this entry yet.