ALL meanings of umbra
um·bra
U u - noun umbra darkness, shadow 1
- noun plural umbra shade; shadow. 1
- noun plural umbra the invariable or characteristic accompaniment or companion of a person or thing. 1
- noun plural umbra Astronomy. the complete or perfect shadow of an opaque body, as a planet, where the direct light from the source of illumination is completely cut off. Compare penumbra (def 1a). the dark central portion of a sunspot. Compare penumbra (def 1b). 1
- noun plural umbra a phantom or shadowy apparition, as of someone or something not physically present; ghost; spectral image. 1
- noun umbra a region of complete shadow resulting from the total obstruction of light by an opaque object, esp the shadow cast by the moon onto the earth during a solar eclipse 0
- noun umbra the darker inner region of a sunspot 0
- noun umbra shade or a shadow 0
- noun umbra the dark central cone of shadow projecting from a planet or satellite on the side opposite the sun 0
- noun umbra the dark central part of a sunspot 0
- noun umbra a phantom, or ghost 0
- noun umbra a perfect or complete shadow, in which no direct light is received from the source of illumination 0