An elongated region of relatively low atmospheric pressure, often extending from a low-pressure center; these areas are typically associated with rising air and rainy or cloudy weather.

an area covered by low atmospheric pressure, specifically a meteorological depression

An atmospheric region where the central air pressure is lower than its surroundings. Air flows inward and upward, cooling and condensing to form clouds and rain, leading to unstable weather.

A low-pressure area in the atmosphere where the air at the center is colder than its surroundings; also known as a [[冷气旋|冷氣旋|leng3 qi4 xuan2]]

A type of tropical cyclone with maximum sustained winds of 17 meters per second or less, corresponding to a wind force of 7 or lower on the Beaufort scale.