n. Something characteristic of a zealot; excessive zeal; fanaticism.
the GNU version of the Collaborative International Dictionary of English
n. The character and behavior of a zealot; excess of zeal; fanatical devotion to a cause.
The Century Dictionary and Cyclopedia
n. Behavior as a zealot; excessive or undue zeal; fanaticism.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. excessive intolerance of opposing views
Word Usage
"Because their zealotry is so extreme, so incompatible with the practical affairs of modern society, and so violent in will and fervent belief, they must be stopped now."