1. the theological system of John Calvin and his followers emphasizing omnipotence of God and salvation by grace alone;
The Collaborative International Dictionary of English v.0.48:
Calvinism \Cal"vin*ism\, n. [Cf. F. Calvinisme.]
The theological tenets or doctrines of John Calvin (a French
theologian and reformer of the 16th century) and his
followers, or of the so-called calvinistic churches.
Note: The distinguishing doctrines of this system, usually
termed the five points of Calvinism, are original sin
or total depravity, election or predestination,
particular redemption, effectual calling, and the
perseverance of the saints. It has been subject to many
variations and modifications in different churches and
at various times.
WordNet (r) 3.0 (2006):
n 1: the theological system of John Calvin and his followers
emphasizing omnipotence of God and salvation by grace alone