Definition: An inflatable buoyant object, often (but not necessarily) round and flexible.

Alright class, settle down now, let’s take a look, At this word “balloon,” a curious book! The dictionary tells us, nice and clear, “An inflatable buoyant object, held so dear.” Let's break it down, piece by piece, you see, "Inflatable," means puffed up, wild and free! Like bubbles bursting, light as air, A shape that’s formed with skillful care. "Buoyant” is the key, don’t you know? It means it floats, putting on a show! Like a boat upon the water bright, A balloon will rise and take to flight. And "round and flexible," adds just a touch, Showing how it bends, doesn't much Stay in one form, but shifts and sways, Like clouds drifting through sunny days. So a balloon is something that can be blown, And floats above you, brightly shown! Do you understand? Raise your hand if you do, A floating wonder, shiny and new!