First Known Use: 1638
Dictionary
umbra
noun um·bra \ˈəm-brə\
plural umbras or um·brae \-(ˌ)brē, -ˌbrī\
Definition of UMBRA
1
: a shaded area
2
a : a conical shadow excluding all light from a given source; specifically : the conical part of the shadow of a celestial body excluding all light from the primary source b : the central dark part of a sunspot
— um·bral \-brəl\ adjective
See umbra defined for kids
ADVERTISEMENT
Origin of UMBRA
Latin
Related to UMBRA
Learn More About UMBRA
Browse
Next Word in the Dictionary: UmbraculaPrevious Word in the Dictionary: umbonulateAll Words Near: umbra
ADVERTISEMENT
Seen & Heard
What made you want to look up umbra? Please tell us where you read or heard it (including the quote, if possible).