Entry 1 sense Webster, 1913 Radiotelegraphic /(rā`dĭ*ŏ*tĕl`ē̇*grăf"ĭk)/ · Ra·di·o·tel·e·graph·ic · IPA 01 a. Of or pertaining to radiotelegraphy; employing, or used or employed in, radiotelegraphy. 1. Of or pertaining to radiotelegraphy; employing, or used or employed in, radiotelegraphy.