(economics) A tax levied upon certain documents, a stamp being applied to show that tax has been paid. / (UK) Ellipsis of stamp duty land tax, a tax on land transactions in England and Northern Ireland.

Designed to withstand hard usage without breaking.

An inheritance tax or estate tax.

(military) A state in which person in the military performs military duties on a full-time basis, as opposed to reserve, where one only occasionally performs military duties.

plural of tour of duty

A duty levied on an imported article to offset the unfair price advantage it holds due to a subsidy paid to producers or exporters by the government of the exporting country if such imports cause or threaten injury to a domestic industry.

(law) A legal obligation imposed on an individual requiring that they adhere to a standard of reasonable care while performing any acts that could foreseeably harm others.

Alternative spelling of dutybound

(electronics) The ratio between the amount of time in which the clock's signal is high and the clock's period.

What one's duty obliges one to do.