Plain English Meaning
A single page that tells a pilot exactly how to find the runway and land when they cannot see the airport until they are close. It lays out the headings, altitudes, and key points to fly, in the order to fly them.
Full Definition
A published chart that depicts the step-by-step procedure for transitioning from the en route phase of flight to a landing at a specific runway under instrument flight rules. It shows the navigation aids, courses, altitudes, fixes, minimum descent or decision altitudes, missed approach instructions, and airport details required to fly the safely.