control definition con·trol (kən trōl′)

transitive verb controlled -·trolled′, controlling -·trol′·ling

1.Obsolete to check or verify (payments, accounts, etc.) by comparison with a duplicate register
2.to regulate (financial affairs)
3.to verify (an experiment) by comparison with a standard or by other experiments
4.to exercise authority over; direct; command
5.to operate or regulate this knob controls the volume of sound
6.to hold back; curb; restrain control your grief
Etymology: ME countrollen < Anglo-Fr contreroller < Fr contrerole < ML contrarotulus, a counter, register < L contra, against + rotulus: see roll
noun

1.the act or fact of controlling; power to direct or regulate; ability to use effectively her control over her passions, the violinist's control of his vibrato
2.the condition of being directed or restrained; restraint the car went out of control
3.a means of controlling; check wage and price controls
4.a standard of comparison for verifying or checking the findings of an experiment; specif., such a standard obtained by withholding the substance, treatment, drug, etc. being tested
5.
a.an instrument or apparatus to regulate a mechanism: usually used in pl.
b.a device used to adjust or control the volume control on an amplifier
6.a spirit supposed to direct the actions and speech of a spiritualistic medium
power (po̵u′ər)

noun

1.ability to do, act, or produce
2.a specific ability or faculty the power of hearing
3.great ability to do, act, or affect strongly; vigor; force; strength
4.
a.the ability to control others; authority; sway; influence
b.special authority assigned to or exercised by a person or group holding office
c.legal ability or authority; also, a document giving it
5.a source of physical or mechanical force or energy; force or energy that is at, or can be put to, work electric power, water power
6.the rate at which work is done: abbrev. P
7.a person or thing having great influence, force, or authority
8.a nation, esp. one having influence or domination over other nations the great powers
9.national might or political strength
10.a spirit or divinity
11.Dialectal a large number or quantity (of something specified)
12.
a.Archaic an armed force; army; navy
b.military strength air power
13.Math.
a.the product of the multiplication of a quantity by itself 4 is the second power of 2 (2)
b.exponent (sense )
14.Optics the degree of magnification of a lens, microscope, telescope, etc., expressed as a ratio of the diameters of image and object
Etymology: ME pouer < OFr poeir, earlier poter, orig. inf. < VL *potere, to be able, for L posse, to be able: see potent
transitive verb

to supply with power or with a source of power
adjective

1.operated by electricity, a fuel engine, etc. power tools, a power mower
2.served by an auxiliary, engine-powered system that reduces the effort of the operation power steering
3.carrying electricity power lines
4.of, for, or signifying persons in business or politics regarded as powerful a power lunch, a power suit