What is a low pressure area?

When meteorologists use the term: low pressure area, what are they referring to?

Low Pressure System - an overview

Safe Rooms and Shelters - What You Need to Know

What Do Meteorologists Mean by Overcast Skies?

Low Pressure Area now East of Samar News from the Philippines

High and low pressure areas

High & Low Pressure Systems - Navigation in a Modern World

How is the depth of a low-pressure area determined by

What is the difference between a high and low pressure? - Quora

Hurricanes: Low-Pressure Areas With Lots Of Thunderstorms, Wind

Why is the centre of a tropical storm an area of low pressure? - Quora