Select the most appropriate meaning of the given idiom.

Know something inside out

To know everything about something

The most appropriate meaning of the idiom "know something inside out" is to know everything about something.

This idiom means to have a thorough and complete understanding of something. It is often used to describe someone who has a lot of experience or expertise in a particular field. For example, you might say "She knows the restaurant business inside out." This means that she has a lot of knowledge about the restaurant industry, from the kitchen to the dining room.

The other options are not as accurate descriptions of the meaning of the idiom.

• To know something from a distance: This means to have a general understanding of something, but not a detailed one.
• To know something superficially: This means to have only a surface-level understanding of something.
• To have only a slight idea about something: This means to have very little knowledge about something.