cablecast adjective 1noun 1verb 1forms 3 adjective1 •broadcast via cable televisionCablecast programs are as popular as many broadcast programs. noun1 •A telecast via cable television. verb1 •To originate a video and audio program by using a broadcast station or infrastructure focused on cable television operation.We will cablecast the final game on this station. formscablecasted · cablecasting · cablecasts