Definitions:
originally: a customary payment to the master and crew of a ship for loading and taking care of the cargo. in later use also: a percentage added to a freight charge to cover the cost of loading or unloading a ship.

a duty paid to the local trinity house society on goods brought into a particular port, especially newcastle-upon-tyne.

an additional or special customs duty on imported goods.

water present as droplets suspended in the steam from a boiler; the amount of this.