evangelism

[ih-van-juh-liz-uh m] /ɪˈvæn dʒəˌlɪz əm/
noun
1.
the preaching or promulgation of the gospel; the work of an evangelist.
2.
evangelicalism.
3.
missionary zeal, purpose, or activity.
Origin
1620-30; evangel2 + -ism
British Dictionary definitions for evangelism

evangelism

/ɪˈvændʒɪˌlɪzəm/
noun
1.
(in Protestant churches) the practice of spreading the Christian gospel RC Church term evangelization, evangelisation
2.
ardent or missionary zeal for a cause
3.
the work, methods, or characteristic outlook of a revivalist or evangelist preacher
4.
a less common word for evangelicalism See evangelicalism
Word Origin and History for evangelism
n.

1620s, from evangel + -ism, or else from Medieval Latin evangelismus "a spreading of the Gospel," from Late Latin evangelium "good news, gospel," from Greek euangelion (see evangelist). In reference to evangelical Protestantism, from 1812.