noun
A supporter of the Irish unionist party Sinn Fein or its policies.
‘he claimed to be a Sinn Feiner’- ‘Da has been chosen to be the election agent for a Dublin Sinn Feiner.’
- ‘He joined Belfast City Council, the first Sinn Feiner to be elected in east Belfast.’
- ‘They mistook him for his namesake, a Sinn Feiner.’
- ‘Mainstream Sinn Feiners were very disparaging of his decision.’
- ‘He was an open sympathizer with the Sinn Feiners.’
- ‘In 1919, frustration over the lack of Home Rule led the Irish Sinn Feiners to form their own parliament, known as Dail Eireann.’
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