Definition of "radiothon" [radiothon]

• An extended charity appeal on the radio (noun)

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• "One of the specific Army projects funded by the radiothon is the mobile van that helps people who might not have the knowledge or ability to reach a shelter on their own."
• "Levros noted that Radio Latino planned a day-long "radiothon" from 7 a.m. to 7 p.m."
• "For instance, Rush runs a "radiothon" every year for leukemia."