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bullhorn

1 ENTRIES FOUND:
bullhorn /ˈbʊlˌhoɚn/ noun
plural bullhorns
bullhorn
/ˈbʊlˌhoɚn/
noun
plural bullhorns
Britannica Dictionary definition of BULLHORN
[count] US
: an electrical device that is used for making your voice much louder so that you can be heard over a large distance
called also (British) loudhailer
compare megaphone