1. relating to or produced by a megaphone
2. having a very loud or booming voice

Examples

• The coach’s megaphonic voice could be heard across the entire field.
• She used a megaphonic device to address the large crowd.
• His megaphonic announcements echoed through the stadium.
• The megaphonic quality of her speech made everyone stop and listen.
• The protest organizer’s megaphonic calls rallied the demonstrators.
• The megaphonic sound system ensured everyone could hear the safety instructions.