Alright kiddo, you know how in your classroom you keep your crayons and markers in a box so you can easily find the color you want? Well, a defining dictionary is like a huge box full of words and their meanings.
Let's say you came across a word you didn't know while reading a book. You could go to the defining dictionary to find out what it means. It's like having a teacher who knows all the meanings of all the words and is ready to tell you!
The defining dictionary is different from a regular dictionary because it not only tells you what the word means, but also where it came from, how to use it in a sentence, and sometimes even how it sounds! It's like a really cool tool for learning new words and understanding what they mean.