Définitions
1.NounA weather vane, sometimes in the form of a cockerel.
2.NounOne who veers with every change of current opinion; a fickle, inconstant person.
3.NounA kind of wind pump whose top behaves like a weather vane, moving with the wind direction, but which also has a wheel attached to measure wind speed.
4.VerbTo turn upwind because of the difference in water pressure on two sides.
5.VerbTo veer into the direction of the oncoming (relative) wind.
6.VerbTo act as a weathercock for.