transmitter

American  

[trans-mit-er, tranz-] / trænsˈmɪt ər, trænz- /

noun

1. a person or thing that transmits.

2. Also called transmitting set.  Radio. a device for sending electromagnetic waves; the part of a broadcasting apparatus that generates and modulates the radiofrequency current and conveys it to the antenna.

3. the part of a telephonic or telegraphic apparatus that converts sound waves or mechanical movements into corresponding electric waves or impulses.

4. Biochemistry. neurotransmitter.

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transmitter British  

/ trænzˈmɪtə /

noun

1. a person or thing that transmits

2. the equipment used for generating and amplifying a radio-frequency carrier, modulating the carrier with information, and feeding it to an aerial for transmission

3. the microphone in a telephone that converts sound waves into audio-frequency electrical signals

4. a device that converts mechanical movements into coded electrical signals transmitted along a telegraph circuit

5. physiol short for neurotransmitter

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transmitter Scientific  

/ trăns′mĭt-ər /

1. A device that converts sound, light, or electrical signals into radio, microwave, or other electrical signals of sufficient strength for the purpose of telecommunication.

2. Compare receiver

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Etymology

Origin of transmitter

First recorded in 1720–30; transmit + -er ¹

Example Sentences

The unit was on a training mission when it was redirected to assist in the search and rescue effort, after an emergency locator transmitter signal alerted the US Coast Guard about a potential distress situation.

From BBC • May 14, 2026

For decades, proportional response functioned less as a strategy than a ritual: hit a transmitter, strike a barracks.

From The Wall Street Journal • Apr. 23, 2026

In a study published in Advanced Photonics Nexus, researchers developed a compact optical wireless transmitter that delivers both extremely high speeds and improved energy efficiency.

From Science Daily • Apr. 2, 2026

Declining to specify where the transmitter is located, she said it is "closer to the Netherlands than to Iran" -- although Tehran "can figure it out" if they choose.

From Barron's • Mar. 13, 2026

Presently, Bigger cupped his hand to his mouth and spoke through an imaginary telephone transmitter.

From "Native Son" by Richard Wright