Weath'er-cock, n.

n. 1. A vane, or weather-vane; — so called because originally often in the figure of a cock, turning on the top of a spire with the wind, and showing its direction. Noisy weather-cocks rattled and sang of mutation. Longfellow. 2. Hence, any thing or person that turns easily and frequently; a fickle, inconstant person.