(a.) Of or pertaining to or employing or operated by, radiant energy, specifically that of electric waves; hence, pertaining to or employed in, radiotelegraphy.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). radio. Retrieved September 20, 2026, from http://smartdefine.org/radio/definitions/2052300 |
| Chicago | Webster's. 2011. "radio" http://smartdefine.org/radio/definitions/2052300 (accessed September 20, 2026). |
| Harvard | Webster's 2011, radio, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/radio/definitions/2052300>. |
| MLA | Webster's. "radio" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/radio/definitions/2052300> |