A person who conforms to current opinions, especially for reasons of personal advantage; an opportunist.
A device, node or program that transmits the correct time to clients in a network.
Someone who performs a job for the required time only, making a minimum of effort.
One who veers with every change of current opinion; a fickle, inconstant person.
A weather vane, sometimes in the form of a cockerel.
A 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.
To act as a weathercock for.
To turn upwind because of the difference in water pressure on two sides.
To veer into the direction of the oncoming (relative) wind.