Evangelism is the preaching of the gospel with the intention of exposing God's love to all mankind through Jesus Christ.
Christians who specialize in evangelism are often known as evangelists, whether they are in their home communities or living as missionaries in the field, although some Christian traditions refer to such people as missionaries in either case. Some Christian traditions consider evangelists to be in a leadership position; they may be found preaching to large meetings or in governance roles.
Christian groups who encourage evangelism are sometimes known as evangelistic or evangelist. The scriptures do not use the word evangelism, but evangelist is used in (the translations of) Acts 21:8, Ephesians 4:11, and 2 Timothy 4:5.
The word "evangelist" comes from the Koine Greek word (transliterated as euangelion) via Latinised evangelium as used in the canonical titles of the Four Gospels, authored by (or attributed to) Matthew, Mark, Luke, and John (also known as the Four Evangelists). The Greek word εὐαγγέλιον originally meant a reward given to the messenger for good news (εὔ = "good", ἀγγέλλω = "I bring a message"; the word "angel" comes from the same root) and later "good news" itself.
The verb form of euangelion, (translated as "evangelism"), occurs rarely in older Greek literature outside the New Testament, making its meaning more difficult to ascertain. Parallel texts of the Gospels of Luke and Mark reveal a synonymous relationship between the verb euangelizo () and a Greek verb kerusso (), which means "to proclaim".