EU27 noun2 •Collectively, the twenty-seven member states of the EU after 2020, after the United Kingdom left the union.The [NIBIO] report presents a simplified energy balance for Norway and the EU27 in 2022, highlighting the significant contributions of hydropower, wind power and other sources beyond bioenergy. — 2024 •(historical) Collectively, the twenty-seven member states of the EU between 2007 and 2013, after Bulgaria and Romania joined the union.