What is the meaning of Brazen?

Made of brass.

Brass-like in appearance or character; bright, ruddy, hard.

Sounding harsh and loud, like brass cymbals or brass instruments.

Extremely strong; impenetrable; resolute.

Shameless or impudent; shocking or audacious; brash.

To turn a brass color.

Generally followed by out or through: to carry through in a brazen manner; to act boldly despite embarrassment, risk, etc.

Source: wiktionary.org