An item that one must own, or a feature that is essential to a service, etc.
Essential to own.
That which is required by authority; especially, a quota of supplies or necessaries.
A notarial demand for repayment of a debt.
A formal demand made by one state or government upon another for the surrender or extradition of a fugitive from justice.
A call; an invitation; a summons.
A demand by the invader upon the people of an invaded country for supplies, as of provision, forage, transportation, etc.
A formal application by one officer to another for things needed in the public service.
To demand something, especially for a military need of staff, supplies, or transport.