transponder
word
Definition
A transponder is an electronic device that receives a signal and automatically sends a different signal in response, often used in communication, aircraft, or satellites.
Usage & Nuances
Primarily technical; common in aviation, satellites, and toll-road systems. In daily English, rarely used outside specialized contexts. Not to be confused with a simple transmitter or radio.
Example Sentences
If your transponder battery dies, you’ll have to pay cash at the toll.
natural
The plane's transponder sent a signal to air traffic control.
basic
Every satellite has a transponder for communication.
basic
The truck's transponder allows it to pass through tolls automatically.
basic
My car's transponder stopped working, so the gate won't open.
natural
They upgraded the satellite's transponder to boost the signal range.
natural