neat

Neat describes someone or something that is tidy, well-formed or well-done. (adjective)

A room where everything is put away is an example of a neat room.
A person who always has clean clothes and who is always well-groomed is an example of a neat person.
A perfectly drawn straight line is an example of a neat line.
A really cool new painting is an example of a neat painting.

Neat describes something considered cool or awesome. (adjective)

An example of something neat is a well-planned and well-executed project.

See neat in Webster's New World College Dictionary