All 3 Uses

gaudy
in
The Adventures of Tom Sawyer
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Tom was like the rest of the respectable boys, in that he envied Huckleberry his gaudy outcast condition, and was under strict orders not to play with him.†
Chpt 6

gaudy = tastelessly showy
But no, there was something gaudier even than this.†
Chpt 8 *
A little green worm came crawling over a dewy leaf, lifting two-thirds of his body into the air from time to time and "sniffing around," then proceeding again—for he was measuring, Tom said; and when the worm approached him, of its own accord, he sat as still as a stone, with his hopes rising and falling, by turns, as the creature still came toward him or seemed inclined to go elsewhere; and when at last it considered a painful moment with its curved body in the air and then came decisively down upon Tom's leg and began a journey over him, his whole heart was glad—for that meant that he was going to have a new suit of clothes—without the shadow of a doubt a gaudy piratical uniform.†
Chpt 14

gaudy = tastelessly showy

Definitions:

(1) (gaudy)
tastelessly showy
(2) (meaning too rare to warrant focus)
Much more rarely, in classic literature gaudy can refer to something that is extravagantly showy without the implication that it is tasteless. Even more rarely, it can refer to a celebratory feast held by a college.