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- Dictionaryumbra/ˈʌmbrə/
noun
- 1. the fully shaded inner region of a shadow cast by an opaque object, especially the area on the earth or moon experiencing the total phase of an eclipse.
- 2. shadow or darkness: literary "an impenetrable umbra seemed to fill every inch of the museum"
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The meaning of UMBRA is a conical shadow excluding all light from a given source; specifically : the conical part of the shadow of a celestial body excluding all light from the primary source. Did you know?
UMBRA definition: 1. the dark inner part of a shadow in which all light is blocked, used especially about a shadow…. Learn more.
The darkest part of a shadow, especially the cone-shaped region of full shadow cast by Earth, the Moon, or another body during an eclipse. In a full lunar eclipse, which generally lasts for one or two hours, the entire disk of the Moon is darkened as it passes through the umbra.
UMBRA meaning: 1. the dark inner part of a shadow in which all light is blocked, used especially about a shadow…. Learn more.
The very darkest part of a shadow is the umbra. It's where the light source is completely blocked by the object in front of it. You'll most often encounter the word umbra in astronomy, along with penumbra and sometimes antumbra. During a lunar eclipse, the very darkest, inner part of the Earth's shadow is the umbra, while the lighter shadow at ...
Definition of umbra noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
1. A dark area, especially the blackest part of a shadow from which all light is cut off. 2. Astronomy. a. The completely dark central portion of the shadow cast by the earth, moon, or other body during an eclipse. b. The darkest region of a sunspot. [Latin, shadow.] um′bral adj. American Heritage® Dictionary of the English Language, Fifth Edition.
