Definition
A weatherglass is an outdated term for a barometer, an instrument used to forecast weather by measuring atmospheric pressure. It's the antique version of today's digital weather apps π±. High pressure usually means good weather, while low pressure suggests storms are brewing βοΈ. Think of it as a glass thermometer, but for air pressure instead of temperature. Knowing the pressure helps predict incoming weather patterns, similar to how a doctor uses a stethoscope.