Garda Syllabification: (Gar·da)Pronunciation: /ˈgärdə/Definition of Garda noun [treated as singular or plural] the state police force of the Irish Republic. (plural Gardai /-ˈdē/) a member of the Irish police force. Origin:from Irish Garda Síochána 'Civic Guard'Garda in other Oxford dictionaries Definition of Garda in the British & World English dictionary