controllˈer noun

1. A person who supervises financial affairs or examines financial accounts (also comptrollˈer)
2. An official authorized to control some activity or department
3. A person who controls or regulates
4. An apparatus for regulating, eg the speed of an electric car

controllˈership noun

controlˈment noun

1. The act or power of controlling
2. The state of being controlled
3. Control

control account noun (bookkeeping)

An account recording debit and credit totals of other accounts, used for cross-checking purposes and the preparation of financial statements

control character noun (computing)

A keyboard character which is not printed but which starts or controls an operation or device

control engineering noun

The study of the way in which complex systems respond to their controls

control event noun (finance)

A share transaction between companies that gives one of them a controlling interest

control freak noun (informal)

Someone who is extremely or obsessively reluctant to share power or responsibility with others

control key noun (computing)

A key on a computer keyboard which when used in conjunction with standard keys will perform a variety of functions, eg editing

controlled airspace noun

Clearly defined areas in which an aircraft may fly only if it is under radio instructions from air-traffic control

controlled drug noun

Any of certain drugs (incl morphine, cocaine, heroin, etc) to the manufacture, prescribing, etc of which stringent regulations apply (Controlled Drugs Act the act under which these drugs are scheduled)

controlling interest noun

Number of shares sufficient to ensure control over the running of a company

control panel or control board noun

A panel or board containing dials, switches and gauges for operating and monitoring electrical or other apparatus

control register noun (computing)

One which stores a single control instruction in the control unit of a central processor

control rod noun (nuclear eng)

A neutron absorbing rod moved in and out of a reactor core to vary reactivity

control room noun

A room in which control instruments are placed, eg in a broadcasting station

control total noun (computing)

A method of checking that data in a group of records has not been altered in error by comparing totals of certain items before and after processing

control tower noun

A building at an airport from which take-off and landing instructions are given

control unit noun (computing)

The part of a central processor which interprets instructions and controls the execution of a program