dockominiumPronunciation: /ˌdɒkəˈmɪnɪəm/Definition of dockominium noun (plural dockominiums) US a waterfront condominium with a private mooring. a privately owned landing stage at a marina. Origin: 1980s: from dock1, on the pattern of condominiumdockominium in other Oxford dictionaries Definition of dockominium in the US English dictionary