verb (used with object), con·trolled, con·trol·ling.


Verb Phrases

control for, Statistics. to account for (variables in an analysis) by limiting the data under consideration to a comparison of like things: to control for demographic factors.

Origin of control

1425–75; late Middle English co(u)ntrollen (v.) < Anglo-French contreroller to keep a duplicate account or roll, derivative of contrerolle (noun). See counter-, roll
Related formscon·trol·la·ble, adjective, nouncon·trol·la·bil·i·ty, con·trol·la·ble·ness, nouncon·trol·la·bly, adverbcon·trol·less, adjectivecon·trol·ling·ly, adverbnon·con·trol·la·ble, adjectivenon·con·trol·la·bly, adverbnon·con·trolled, adjectivenon·con·trol·ling, adjectiveo·ver·con·trol, verb (used with object), o·ver·con·trolled, o·ver·con·trol·ling, nounpre·con·trol, noun, verb (used with object), pre·con·trolled, pre·con·trol·ling.qua·si-con·trolled, adjectivequa·si-con·trol·ling, adjectivesub·con·trol, verb (used with object), sub·con·trolled, sub·con·trol··per·con·trol, nounun·con·trolled, adjectiveun·con·trol·ling, adjectivewell-con·trolled, adjective

Synonyms for control

Synonym study

6. See authority. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for well-controlled

Contemporary Examples of well-controlled

Historical Examples of well-controlled

  • A well-controlled fire was then commenced on the attacking party.

    The Relief of Chitral

    George John Younghusband

  • The dinner passed pleasantly enough, but both Ethel and Ruth noticed the Judge was under strong but well-controlled feeling.

    The Man Between

    Amelia E. Barr

  • The law of recapitulation is in some well-controlled cases triumphantly vindicated by palæontology.

    Form and Function

    E. S. (Edward Stuart) Russell

  • Madame Piriac finished, with a peculiar inflection of her well-controlled voice.

    The Lion's Share

    E. Arnold Bennett

  • I was sure that I could depend upon him: the more so that once frail of body he had developed into a strong, well-controlled man.

British Dictionary definitions for well-controlled


adjective (well controlled when postpositive)

regulated, operated, or restrained successfully or strictlywell-controlled research work


verb -trols, -trolling or -trolled (tr)

to command, direct, or ruleto control a country
to check, limit, curb, or regulate; restrainto control one's emotions; to control a fire
to regulate or operate (a machine)
to verify (a scientific experiment) by conducting a parallel experiment in which the variable being investigated is held constant or is compared with a standard
  1. to regulate (financial affairs)
  2. to examine and verify (financial accounts)
to restrict or regulate the authorized supply of (certain substances, such as drugs)


power to direct or determineunder control; out of control
a means of regulation or restraint; curb; checka frontier control
(often plural) a device or mechanism for operating a car, aircraft, etc
a standard of comparison used in a statistical analysis or scientific experiment
  1. a device that regulates the operation of a machine. A dynamic control is one that incorporates a governor so that it responds to the output of the machine it regulates
  2. (as modifier)control panel; control room
spiritualism an agency believed to assist the medium in a séance
Also called: control mark a letter, or letter and number, printed on a sheet of postage stamps, indicating authenticity, date, and series of issue
one of a number of checkpoints on a car rally, orienteering course, etc, where competitors check in and their time, performance, etc, is recorded
Derived Formscontrollable, adjectivecontrollability or controllableness, nouncontrollably, adverb

Word Origin for control

C15: from Old French conteroller to regulate, from contrerolle duplicate register, system of checking, from contre- counter- + rolle roll
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for well-controlled



early 14c., "to check, verify, regulate," from Anglo-French contreroller "exert authority," from Medieval Latin contrarotulus "a counter, register," from Latin contra- "against" (see contra) + rotulus, diminutive of rota "wheel" (see roll (n.)). From a medieval method of checking accounts by a duplicate register. Sense of "dominate, direct" is mid-15c. Related: Controlled; controlling.

Control group in scientific experiments is attested from 1952 (from a sense of control attested since 1875).



1580s, from control (v.). Control freak is late 1960s slang.

Online Etymology Dictionary, © 2010 Douglas Harper

well-controlled in Medicine




To verify or regulate a scientific experiment by conducting a parallel experiment or by comparing with another standard.
To hold in restraint; check.


A standard of comparison for checking or verifying the results of an experiment.
An individual or group used as a standard of comparison in a control experiment.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

well-controlled in Science



A standard of comparison for checking or verifying the results of an experiment. In an experiment to test the effectiveness of a new drug, for example, one group of subjects (the control group) receives an inactive substance or placebo , while a comparison group receives the drug being tested.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Idioms and Phrases with well-controlled


see out of control; spin control.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.