not showing emotion; having one's feelings under control

his every word seemed to be calm and controlled

she's a very controlled player and is mentally tough

under the control of someone or something

the country's tightly controlled financial markets

rebel-controlled areas of the country

(of an experiment, test, etc.) carried out under conditions that preclude error or the influence of extraneous factors

the first randomized controlled trial to study the effects of copper bracelets on rheumatoid arthritis

determine the behaviour or supervise the running of

he was appointed to control the company's marketing strategy

take into account (an extraneous factor that might affect the results of an experiment)

no attempt was made to control for variations