adab

(Sumerian: Adabki, D. D. Luckenbill, "Old Babylonian Letters from Bismya", The American Journal of Semitic Languages and Literatures, vol. 32, no. 4, pp. 270–292, 1916 spelled UD.NUNKIJacobsen, Thorkild, "Some Sumerian city-names", Journal of Cuneiform Studies 21.1, pp. 100-103, 1967) an ancient Sumerian city between Girsu and Nippur, lying about 35 kilometers southeast of the latter.

Adab in the context of behavior, refers to prescribed Islamic etiquette: "refinement, good manners, morals, decorum, decency, humaneness".

Adab (Hindustani: آداب (Nastaleeq), आदाब (Devanagari)), from the Arabic word Aadaab, meaning respect and politeness, is a hand gesture used in the Indian subcontinent, by the Urdu-speaking while greeting.