Definition of requisitions:
(n) :
A formal request for something.
(n) :
A formal application by one officer to another for things needed in the public service.
(n) :
(military) A demand by the invader upon the people of an invaded country for supplies, as of provision, forage, transportation, etc.
(n) :
(medicine) A formal request by a doctor or other clinician, usually on a standardized form, for specific medical tests or procedures to be performed on a patient by a third party, such as a laboratory or imaging center
(n) :
A formal demand made by one state or government upon another for the surrender or extradition of a fugitive from justice.
(n) :
(law) A notarial demand for repayment of a debt.