The American Heritage® Dictionary of the English Language, 4th Edition
n. One who is strict and precise in adherence to established rules, forms, or standards, especially with regard to religious observance or moral behavior.
n. Someone who strictly observes the rules; a pedant or stickler.
the GNU version of the Collaborative International Dictionary of English
n. One who limits, or restrains.
n. An overprecise person; one rigidly or ceremoniously exact in the observance of rules; a formalist; -- formerly applied to the English Puritans.
The Century Dictionary and Cyclopedia
Precise; punctiliously or ostentatiously observant of rules or doctrines.
Characteristic of precisians; puritanical.
n. One who adheres punctiliously to certain rules or observances; especially, one who is precise in matters of religion: often used depreciatingly with reference to the English Puritans of the seventeenth century.
Word Usage
""precisian" zealots held, by the governor-general's permission and under his protection, a synod at Dort, June, 1586, and endeavoured to organise the Reformed Church in accordance with their strict principles of exclusiveness."