The contents of a container such as a bottle, box, or room are the things that are inside it.

If you refer to the content or contents of something such as a book, speech, or television programme, you are referring to the subject that it deals with, the story that it tells, or the ideas that it expresses.

The contents of a book are its different chapters and sections, usually shown in a list at the beginning of the book.

The content of something such as an educational course or a programme of action is the elements that it consists of.

You can use content to refer to the amount or proportion of something that a substance contains.