What is a low pressure area?

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

Low-pressure area - Wikipedia

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

Low Pressure Systems

What type of weather will a LOW pressure system bring? As a low

High and low pressure - Met Office

Why do low pressure and high pressure areas spin in different

Pressure Systems – High Pressure System, Low Pressure System

NOAA-20 Sees Low-Pressure System Spinning Off the Coast of South

Geography 101 Online

Winds Around a Low-Pressure Center - Science Pickle