someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous); "the speaker at commencement"; "an utterer of useful maxims"言語で表現する人話者
例:The speaker at commencement. 開式のスピーチをする人。
electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance電気信号を遠くからでも十分に聞き取れるよう大きな音に変換する電気音響変換器ラウドスピーカーシステム
the presiding officer of a deliberative assembly; "the leader of the majority party is the Speaker of the House of Representatives"審議会の司会を務める人議長