- a popular name for a member of the Society of Friends.
- a member of the Religious Society of Friends, a Christian sect founded by George Fox about 1650, whose central belief is the doctrine of the Inner Light. Quakers reject sacraments, ritual, and formal ministry, hold meetings at which any member may speak, and have promoted many causes for social reform
- of, relating to, or designating the Religious Society of Friends or its religious beliefs or practices
