All 10 Uses of

grotesque
in
The Hunchback of Notre Dame

You have here enough grotesque specimens of both sexes, to allow of laughing in Flemish fashion, and there are enough of us ugly in countenance to hope for a fine grinning match.†
Chpt 1.1.4 *

Let the reader imagine all these grotesque figures of the Pont Neuf, those nightmares petrified beneath the hand of Germain Pilon, assuming life and breath, and coming in turn to stare you in the face with burning eyes; all the masks of the Carnival of Venice passing in succession before your glass,—in a word, a human kaleidoscope.†
Chpt 1.1.5

After all the pentagonal, hexagonal, and whimsical faces, which had succeeded each other at that hole without realizing the ideal of the grotesque which their imaginations, excited by the orgy, had constructed, nothing less was needed to win their suffrages than the sublime grimace which had just dazzled the assembly.†
Chpt 1.1.5

lastly, fashions, even more grotesque and foolish, which, since the anarchical and splendid deviations of the Renaissance, have followed each other in the necessary decadence of architecture.†
Chpt 1.3.1

A single pointed window, narrowly encased in the thick wall, illuminated with a pale ray of January sun two grotesque figures,—the capricious demon of stone carved as a tail-piece in the keystone of the vaulted ceiling, and the judge seated at the end of the hall on the fleurs-de-lis.†
Chpt 1.6.1

It is certain that at that moment he was more grotesque and repulsive than pitiable, with his face purple and dripping, his eye wild, his mouth foaming with rage and pain, and his tongue lolling half out.†
Chpt 1.6.4

Among the grotesque personages sculptured on the wall, there was one to whom he was particularly attached, and with which he often seemed to exchange fraternal glances.†
Chpt 2.9.4

When they find me in that little lodging so grotesquely muffled in petticoat and coif, perchance they will burst with laughter.†
Chpt 2.10.1

Add twenty secondary groups, the waiters, male and female, running with jugs on their heads, gamblers squatting over taws, merelles,* dice, vachettes, the ardent game of tringlet, quarrels in one corner, kisses in another, and the reader will have some idea of this whole picture, over which flickered the light of a great, flaming fire, which made a thousand huge and grotesque shadows dance over the walls of the drinking shop.†
Chpt 2.10.3

Definitions:

(1) (grotesque)
distorted and unnatural in shape or size -- especially in a disturbing way

or:

ugly, gross, or very wrong
(2) (meaning too rare to warrant focus)
meaning too rare to warrant focus:

More rarely, grotesque can refer to a style of art or instances of it that combines or distorts in a fanciful way natural forms into something that is often ugly or disturbing. Grotesque can also be used specifically to reference a gargoyle-like sculpture without a waterspout.