1. speaking through or as if through a megaphone; amplifying one’s voice loudly
Usage: present participle of megaphone

Examples

• The coach was megaphoning instructions from the sideline.
• She stood on the platform, megaphoning announcements to the crowd.
• The protesters were megaphoning their demands outside city hall.
• He was megaphoning directions to the rescue team below.
• The lifeguard was megaphoning safety warnings to the swimmers.
• They were megaphoning the evacuation orders throughout the neighborhood.