transponder

🇺🇸 /trænˈspɑːndər/ 🇬🇧 /trænˈspɒndə(r)/
Frequency
Difficulty
Tags TOP20000
noun
R

A device that picks up a radio signal and automatically sends back a different signal.

The airplane's transponder helps air traffic controllers track its location.

translation

n. A device that picks up a radio signal and automatically sends back a different signal.

Word Forms

Plural transponders