1. The region of partial shadow between the umbra and the fully illuminated area during a lunar or solar eclipse, where the light source is partially obscured
During the lunar eclipse, observers in the penumbra completa could still see some sunlight reaching the Moon's surface.
Durante o eclipse lunar, observadores na penumbra completa ainda podiam ver alguma luz solar atingindo a superfície da Lua.
2. In a broader sense, a state of incomplete darkness or partial shadowing
The room existed in a penumbra completa, neither fully lit nor completely dark.
A sala existia numa penumbra completa, nem totalmente iluminada nem completamente escura.