Umbra umbra • umbracious · · · Info · Definitions · Characters · · Umbra · · Text Latin · · Script 5 · · Length 2 · · Syllables Definitions · · · (noun) a region of complete shadow resulting from total obstruction of light. Synonyms: umbra. · · Noun Definition 1 Characters · · U latin capital letter u U+0055 a latin small letter a U+0061 b latin small letter b U+0062 m latin small letter m U+006D r latin small letter r U+0072