Noun: umbra (umbrae,umbras) úm-bru
- A region of complete shadow resulting from total obstruction of light
"During the solar eclipse, the moon's umbra fell on a narrow strip of Earth"
- A region of deep shadow or complete darkness
"She stood in the umbra of the old oak tree"
Derived forms: umbras, umbrae
Type of: shadow
Encyclopedia: Umbra, penumbra and antumbra