Definition: The technology that allows for the transmission of sound or other signals by modulation of electromagnetic waves.

Alright class, settle down, let’s take a look, At this word “radios,” a curious book! The dictionary gives us a clever clue, About what radios really do. Let's break it down, nice and slow, So the meaning truly starts to grow. “Technology” – that means tools we use, To make things happen, don’t you lose? "Transmission of sound" - voices clear, Like a singer singing, far and near! Or music playing, a joyful beat, Sent out through space, oh so sweet! But it's not just sound, you see, Other signals can travel free! “Modulation” – this is the key, Changing waves for all to agree. Electromagnetic waves, a powerful might, Carrying messages, shining bright! So basically class, radios are grand, Using wave magic, across the land! They take sounds and signals, swift and true, And send them out for me and you! Do you have any questions? Don’t be shy, Let's talk about this, way up high!