(Aramaic) from a root corresponding to rabah; increase (of dignity) -- greatness, majesty.
see HEBREW rabah
H7238. rebu
רְבוּ noun feminine greatness (ᵑ7 Syriac); — absolute ׳ר Daniel 4:33, emphatic רְבוּתָא 5:18 +, suffix תָךְ- 4:19; — greatness of king 4:19; 4:33; 5:18-19, of kingdom 7:27.