BIG thanks to wordpress glossary for these definitions in plain English

WP Glossary is a side project by Anders Norén. He lives in Stockholm, Sweden and have been an avid user of WordPress for more than ten years. He works at the digital agency Divide & Conquer, where they primarily build websites and services with – naturally – WordPress. When he is not working, you’ll often find him tinkering with one of his many free WordPress themes.