Overview (noun)

1. A general description or survey of something.
2. A broad outline of a subject or situation.
3. A summary of the main points of something.

Origin:

Mid-19th century: from over- + view.

Examples:

1. The overview of the project gave us a good idea of what to expect.
2. The report provided an overview of the company's financial performance.
3. The overview of the situation showed us the big picture.
4. The teacher's overview of the lesson was very helpful.
5. The overview of the book gave an idea of the plot.