Chris·ti·an·i·ty (krĭs′chē-ănĭ-tē, krĭs′tē-)
1. A religion based on the life and teachings of Jesus. Most forms of Christianity hold that Jesus is the son of God and is the second person of the Trinity, through whom humans may attain redemption from sin.
2. Christians as a group; Christendom.
3. The state or fact of being a Christian.
4. pl. Chris·ti·an·i·ties A particular form or sect of the Christian religion: the Christianities of antiquity.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.