Vane

A flat, thin, often rotating blade or plate designed to catch the wind and cause motion, as in a windmill or weathercock. Primarily, it serves as a directional indicator, especially on a weathercock, showing wind direction. Figuratively, it can represent a changing or unreliable personality, easily swayed by external influences. Functionally, it captures airflow to initiate or control a mechanical process. It can also be used for steering or guiding equipment. The shape and size depend heavily on the application. It serves multiple uses in the modern age in various technologies.

Vane meaning with examples

• The weather vane atop the old church steeple spun wildly, pointing towards the east as the storm rolled in. Its arrow, crafted from iron, was perfectly balanced and sensitive to the slightest breeze. It offered a reliable indication of the wind's direction, alerting the townsfolk to the changing weather patterns. The vane, though small, was a vital part of the community, providing advance warning.
• The windmill's vanes, long and broad, caught the strong gusts of wind and set the machinery in motion, grinding the wheat. Their design was optimized to maximize wind capture and efficiently convert wind energy to produce flour for the village. Without those powerful vanes the old mill would remain silent. Their steady rotation provided the rhythm of the rural economy and way of life.
• His political beliefs were like a weather vane, constantly shifting with public opinion and the latest poll numbers. He was easily influenced, lacking his own set core values. He changed his mind with whatever felt to be right, the pressure. The voters' support would lead him to take the opposite path. His convictions were shallow, reflecting the currents of societal thought.
• The control vanes in the jet engine precisely adjusted the airflow, allowing the pilot to change direction or control thrust. These vanes helped the aircraft maneuver and stay on course, altering the exhaust flow. The vanes could be opened or closed at will. The precision in which they moved, determined how fast it could move.