meaning of conventicle
1. A small assembly or gathering; esp. , a secret assembly.
2. An assembly for religious worship; esp. , such an assembly held privately, as in times of persecution, by Nonconformists or Dissenters in England, or by Covenanters in Scotland; -- often used opprobriously, as if those assembled were heretics or schismatics.
3. a building for religious assembly especially Nonconformists, e. g. , Quakers