<p><strong>Noun</strong></p><ul><li>Physics. the process in which energy is emitted as particles or waves.</li><li>the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and absorbed by another body.</li><li>the energy transferred by these processes.</li><li>the act or process of radiating.</li><li>something that is radiated.</li><li>radial arrangement of parts.</li></ul>