[{"Bold_text": "noun", "List Items": ["Electricity.a radio wave radio waveshorter than that used in AM broadcasting, corresponding to frequencies of over 1600 kilohertz: used for long-distance reception or transmission.", "shortwave radio shortwave radio.", "Physics.a wave of electromagnetic radiation electromagnetic radiationequal in length to, or shorter than, the wavelength of visible light."]}, {"Bold_text": "adjective", "List Items": ["of, relating to, or using shortwaves."]}, {"Bold_text": "verb (used with or without object)", "List Items": ["to transmit by shortwaves."]}]