Tra từ speaker - Từ điển Oxford Advanced Learner 8th

speak·er [speaker speakers] BrE [ˈspiːkə(r)] NAmE [ˈspiːkər] noun
1. a person who gives a talk or makes a speech
• He was a guest speaker at the conference.
• She was a brilliant public speaker.
•The Society has an interesting talk by a visiting speaker every month.
2. a person who is or was speaking
• I looked around to see who the speaker was.
• A speaker conveys information through tone and body language.
3. a person who speaks a particular language
•Chinese speakers
•a native speaker of English
4. (the) Speakerthe title of the person whose job is to control the discussions in a parliament
•the Speaker of the House of Commons/Representatives
5. the part of a radio, computer or piece of musical equipment that the sound comes out of
•a CD player and radio with two ultra-slim speakers

see also ↑loudspeaker

Thesaurus:
speaker noun
1. C
•He is a brilliant public speaker.
lecturer • |formal orator •
a good/brilliant speaker/lecturer/orator
the principal speaker/lecturer
a visting/guest speaker/lecturer
2. C
•a native speaker of English
talker • • communicator •
a good/great speaker/talker/communicator
an effective/excellent speaker/communicator

Synonyms:
speaker
communicator • gossip • talker
These are all words for a person who talks or who is talking, especially in a particular way.
speaker • a person who is or was speaking; a person who speaks a particular language: ▪ I looked around to see who the speaker was. ◇ ▪ a fluent Arabic speaker
communicator • (rather formal) a person who is able to describe their ideas and feelings clearly to others: ▪ The ideal candidate will be an effective communicator.
gossip • (disapproving) a person who enjoys talking about other people's private lives: ▪ Myra is a dear, but she's also a terrible gossip.
talker • a person who talks in a particular way or who talks a lot: ▪ He's a very persuasive talker. ◇ ▪ She's a (great) talker ▪ (= she talks a lot) ▪.
speaker or talker?
Talker is used when you are talking about how much sb talks or how well they talk. It is not used for the person who is or was talking: I looked round to see who the talker was. You can say that sb is a good/persuasive speaker but that means that they are good at making speeches. If you mean that they speak well in conversation, use talker.
a good/great speaker/communicator/talker
an effective/excellent speaker/communicator

Example Bank:
•He makes his living as a motivational speaker.
•He's a fluent Arabic speaker.
•She's a good public speaker.
•The computer has built-in stereo speakers.
•a keynote speaker at the Republican convention
•a new set of speakers
•sound effects coming from the rear speakers
•speakers of English
•the commencement speaker at my graduation
•He is a brilliant public speaker.
•Marina Warner was the keynote speaker at the conference.