1
: an alloy consisting essentially of copper and zinc in variable proportions
2
a
: the brass instruments of an orchestra or band
—often plural
b
: a usually brass memorial tablet
c
: bright metal fittings, utensils, or ornaments
d
: empty cartridge shells
3
: brazen self-assurance : gall
4
singular or plural in construction
a
: high-ranking members of the military
b
: persons in high positions (as in a business or the government)
1
: made of brass
a brass cannon
see also brass ring, brass tacks
2
: made up of or composed for brass musical instruments
the band's brass section
see also brass band
Cite this Entry
“Brass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brass. Accessed 7 Sep. 2026.
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