Including... The EXPLANATION of each idiom. USAGE NOTES to learn the history and/or way to use the idiom The STRUCTURE showing the grammar usage of the idiom. EXAMPLE sentences to see how the idiom is used in context. What is an idiom? An idiom is a word or set of words that have a different meaning than the usual & literal meaning of those words. For example, let's look at the idiom, "get the ball rolling." To start a game like bowling or billiards,...