Real Dictionary

apart in American English
to one side; at a little distance; aside
adverb: into pieces or parts; to pieces

apart in British English
to pieces or in pieces

apart indicating exceptions and focusing
You use apart when you are making an exception to a general statement.

apart positions and states
If two people or things move apart or are pulled apart, they move away from each other.
When people or things are apart, they are some distance from each other.