1. A cone-shaped acoustic device held to the mouth to intensify and direct the human voice
   "The coach used a megaphone to instruct the athletes on the field"
    
2. [informal] A means of broadcasting or amplifying one's message or views
   "Social media became the megaphone for their protest movement"

1. To speak or announce through a megaphone
   "The police megaphoned instructions to the crowd"
    
2. [informal] To broadcast or publicize widely
   "The company megaphoned its success across social media"

Derived forms: megaphoning, megaphones, megaphoned

Type of: acoustic device

Encyclopedia: Megaphone