kroon Syllabification: (kroon)Pronunciation: /kro͞on/Definition of kroon noun (plural kroons or krooni /ˈkro͞onē/) (until the introduction of the euro in 2011) the basic monetary unit of Estonia, equal to 100 senti. Origin:Estonian, literally 'crown'; compare with krona, kronekroon in other Oxford dictionaries Definition of kroon in the British & World English dictionary