I. ˈme-gə-ˌfōn noun
Date: 1878
: a cone-shaped device used to intensify or direct the voice
• mega·phon·ic ˌme-gə-ˈfä-nik adjective
II. verb
Date: 1901
transitive verb
: to transmit or address through or as if through a megaphone
intransitive verb
: to speak through or as if through a megaphone