The act of assessing or an amount (of tax, levy or duty etc) assessed.
An appraisal or evaluation.
A tax placed on imports or exports; a tariff.
That which one is morally or legally obligated to do.
The state of being at work and responsible for or doing a particular task.
The efficiency of an engine, especially a steam pumping engine, as measured by work done by a certain quantity of fuel; usually, the number of pounds of water lifted one foot by one bushel of coal (94 lbs. old standard), or by 1 cwt. (112 lbs., England, or 100 lbs., United States).