DON Views 15 meanings found DON can refer to the Department of the Navy in the United States, the gambling term “double or nothing,” or scientific concepts like dissolved organic nitrogen, and it even appears as the Dutch abbreviation for Thursday (donderdag). Medical Demyelinating Optic Neuritis Director Of Nursing Miscellaneous Double Or Nothing Dimensionality Of Nations Dreaming Of Neverland Drunk On Nectar Governmental Dept Of The Navy Department Of the Navy Dead Of Night International Donderdag Academic & Science Dissolved Organic Nitrogen DeOxyNivalenol Death Of Nation Business Donnelly Corporation DiamonEx, LTD.