Contents are the things inside something or the different parts that make up a whole.

When you open your backpack, the contents might include books, pencils, a sandwich, and maybe a crumpled permission slip. When a teacher asks you to empty the contents of your desk, you pull out everything stored inside: notebooks, markers, old erasers, and whatever else has accumulated there.

The word also refers to the organized list of what's in a book or document. The table of contents at the beginning of a textbook shows all the chapters and topics, helping you find exactly what you need. When a science textbook lists contents like “Chapter 3: The Solar System” and “Chapter 4: Forces and Motion,” it's giving you a map of everything inside.

You might hear someone describe the contents of a package they received, meaning everything that came in the box. Or a chef might list the contents of a recipe: flour, eggs, sugar, and butter. The word emphasizes what's actually there, the substance of something rather than just its container or cover.

Notice that contents usually takes the plural form, even when talking about a single container. You say “the contents are spilling out,” not “the contents is spilling out.”