What does umbra mean?
The innermost and darkest part of a shadow, where the light source is completely blocked by an object. In astronomy, the umbra is the innermost part of a solar eclipse, where the Moon completely covers the Sun.
Example
"The photographer carefully positioned herself to capture the umbra of the tree's branches on the forest floor."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.