Noun
An incomplete or partial shadow.
The shadow cast, in an eclipse, where the light is partly, but not wholly, cut off by the intervening body; the space of partial illumination between the umbra, or perfect shadow, on all sides, and the full light.
The part of a picture where the shade imperceptibly blends with the light.
Source: Webster's dictionaryA penumbral eclipse occurs when the moon passes through the Earth's penumbra. Source: Internet
A total eclipse occurs when the observer is within the umbra, an annular eclipse when the observer is within the antumbra, and a partial eclipse when the observer is within the penumbra. Source: Internet
Partial solar eclipse – the Moon's penumbra falls on the Earth's surface, and the observer is within the penumbra. Source: Internet
Penumbra Theatre's take on Matthew Lopez's drama was dark, complex, and short on easy answers. Source: Internet
Pinoy group El Gamma Penumbra wins first ‘Asia’s Got Talent’ Source: Internet
Earth's penumbra no longer makes contact with the Moon. Source: Internet