radio
UK: ˈreɪdiəʊ | US: ˈreɪdioʊ
n. 1. A device for receiving or transmitting audio signals via electromagnetic waves.
n. 2. The broadcasting industry or medium using such technology.
vt. 3. To transmit or communicate by radio.
The word radio originates from the Latin radius (ray), reflecting the concept of electromagnetic waves radiating outward. Coined in the early 20th century, it initially described wireless telegraphy before evolving to denote audio broadcasting. The suffix -o was adopted from similar scientific terms (e.g., photo, audio), streamlining the word for modern usage.
She turned on the radio to listen to the morning news.
The ship’s crew used the radio to call for help.
He works in radio as a talk show host.
The police officer radioed for backup.
Vintage radios are popular among collectors.