controller
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controller noun. See also COMPTROLLER. LME.
[Anglo-Norman contrerollour, from contreroller: see CONTROL verb, -ER2.]
A person who keeps a duplicate register so as to exercise a check on a treasurer or person in charge of accounts; an official appointed to supervise expenditure; a steward. (Freq. COMPTROLLER.) LME.
A (censorious) critic. M16-E17.
A person who or thing which controls or regulates. M16.
quality controller: see QUALITY noun & adjective.
b. A device or mechanism by means of which the operation of a machine can be regulated. L19.
Comb.: controller-general an official exercising overall responsibility.
controllership noun the office of controller L15.