<p><strong>Noun</strong></p><ul><li>a telephone in which sound or speech is transmitted by means of radio waves instead of through wires or cables.</li><li>RT (radiotelephone).</li><li>an instrument for detecting and measuring small amounts of radiant energy.</li></ul><p><strong>Verb</strong></p><ul><li>to telephone by radiotelephony.</li><li>radio-telephoned, radio-telephoning.</li></ul>