All 3 Uses

brazen
in
The Mill on the Floss
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Mr. Stelling was a well-sized, broad-chested man, not yet thirty, with flaxen hair standing erect, and large lightish-gray eyes, which were always very wide open; he had a sonorous bass voice, and an air of defiant self-confidence inclining to brazenness.†
Chpt 2.1 *
Mr. Tulliver was not by any means an exception in mistaking brazenness for shrewdness; most laymen thought Stelling shrewd, and a man of remarkable powers generally; it was chiefly by his clerical brethren that he was considered rather a full fellow.†
Chpt 2.1
"Yes, better quality nor any you're like to carry; you've got nothing first-rate but brazenness, I'll be bound," said Mrs. Glegg, with a triumphant sense of her insurmountable sagacity.†
Chpt 5.2

Definitions:

(1) (brazen)
bold and unrestrained by what others consider proper
(2) (meaning too rare to warrant focus)
Less commonly, brazen can reference something made of or resembling brass (as in color or hardness). It can also reference an especially loud or harsh sound.