Definition: Any specific chemical element or chemical compound or alloy.

Alright class, settle down, let’s take a look! You’ve got a great question here, and the dictionary’s definition is pretty spot on – it’s quite profound. Let's break it down piece by piece, so you understand with ease: “Chemicals” – it’s more than just a single word, you see, It’s about elements - tiny parts, naturally free! Like hydrogen and oxygen, shining bright and bold, The building blocks of matter, stories to be told. Then there are compounds , formed with care, Two or more elements combining, a partnership rare! Water is a compound – H2O you know, Hydrogen and Oxygen, putting on quite the show! And finally, alloys - that’s where it gets refined, When metals are mixed together, cleverly combined. Like brass with copper shining, a beautiful hue, These combinations of substances, both sturdy and true. So, "chemicals" means anything at all, From single atoms to mixtures standing tall! It's about the stuff that makes up everything we find, The basic components of our world, so cleverly designed! Do you have any questions about this concept, class? Don’t be shy, let’s discuss!