remainer
noun [ C ] UK (also Remainer) uk/rɪˈmeɪn.ər/ us/rɪˈmeɪn.ɚ/
（在英国2016年的全民公决中投票支持英国留在欧盟的）留欧派人士
a person who voted for the United Kingdom to remain in the European Union in the 2016 referendum (= a vote in which all the people in a country are asked to decide an important political or social question )
She said that Brexit would happen and remainers would be forced to accept it. 她说英国脱欧是会发生的，留欧派将被迫接受现实。