1. 发言人;演讲者;演说家
    A speaker at a meeting, conference, or other gathering is a person who is making a speech or giving a talk.

speaker什么意思

    e.g. Among the speakers at the gathering was Treasury Secretary Nicholas Brady...
           与会的发言人中有财政部长尼古拉斯·布莱迪。
    e.g. Bruce Wyatt will be the guest speaker at next month's meeting...
           布鲁斯·怀亚特将成为下月会议的特邀发言人。

2. 讲某种语言的人
    A speaker of a particular language is a person who speaks it, especially one who speaks it as their first language.

speaker的解释

    e.g. ...in the Ukraine, where a fifth of the population are Russian speakers...
           在乌克兰，有五分之一人口说俄语
    e.g. The Department has a growing section which teaches English to speakers of other languages.
           这个系有一个日益壮大的教研组负责向操其他语言的人教授英语。

3. (议会或立法机构的)议长
    In the parliament or legislature of many countries, the Speaker is the person who is in charge of meetings.

    e.g. For twenty minutes, the Speaker tried to keep order.
           20 分钟的时间里，议长一直在竭力维持秩序。
    e.g. ...the Speaker of the Polish Parliament...
           波兰议会的议长

4. 说话人
    A speaker is a person who is speaking.

speaker是什么意思

    e.g. From a simple gesture or the speaker's tone of voice, the Japanese listener gleans the whole meaning.
           仅从一个简单的手势或者说话人的语气里，日本人就能够领悟到所有的意思。

5. 扬声器;喇叭
    A speaker is a piece of electrical equipment, for example part of a radio or set of equipment for playing CDs or tapes, through which sound comes out.

    e.g. For a good stereo effect, the speakers should not be too wide apart.
           为了达到理想的立体声效果，扬声器之间的距离不能太远。