from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The attitude or belief that a particular doctrine, especially a religion or political theory, is superior to all others.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The attitude or belief that a particular doctrine, culture, or social system, particularly a religious or political one, is superior and that it will or should triumph over all others.
triumphal + -ism (Wiktionary)