from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To shade; to darken; to cloud.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To shade; to darken; to cloud.
from The Century Dictionary and Cyclopedia
- To overshadow; shade; darken; cloud.
- In zoology, lying under a projecting part: specifically said of the abdomen when it is concealed under the posterior thoracic segments, as in certain Arachnida.
Latin obumbratus, past participle of obumbrare to overshadow, cloud; ob + umbrare to shade. (Wiktionary)