con|trolled [kənˈtrəuld US -ˈtrould] adj
1.) deliberately done in a particular way, or made to have particular qualities
a test held under controlled conditions
a controlled explosion
2.) limited by a law or rule
Access to the site is closely controlled.
a police search for controlled drugs (=a drug that is illegal to have without permission from a doctor)
3.) calm and not showing emotion, even if you feel angry, afraid etc
a controlled, authoritative voice

Dictionary of contemporary English. 2013.