The doctrine of the Catharists.

Strictness, rigid adherence to rules; the practice or conduct of a precisian; an instance of this. In earlier use: spec. Puritanism.

The belief system, doctrines, or principles of the Puritans of the late 16th and 17th centuries; the opinions or practices of Puritans.

= puritanism, n. 2.

Hence contemptuously for: A Presbyterian or Independent minister; puritanism. Obsolete.

The principles or practice of a Puritan ‘Saint’ (see saint, adj. 3).

The doctrine of the Perfectists.

Zealous or fervent preaching, esp. that associated with Protestants or Puritans or (more generally) with evangelical revivalism.

the practice or beliefs of a wowser or wowsers.