They are known, variously, as far right, national-conservative, radical right, anti-Islam, nativist, and Eurosceptic. Also as extreme right, populist, “alt-right”, neofascist, anti-immigration, nationalist, authoritarian, and assorted combinations of the above. As the dust settles on the results of this month’s European parliamentary elections, it is worth examining what some of the terms routinely used to describe Europe’s wide array of far-right parties mean – and whether they are always the right ones. For this brief lexicon, the Guardian has adopted the definitions of The PopuList, a groundbreaking project involving more than 100 political scientists from 30-plus countries that classifies Europe’s...