Definition of controlled
1 : restrained
2 : regulated by law with regard to possession and use controlled drugs
Examples of controlled in a sentence
Instead of arguing, they talked in a calm, controlled manner.
The test was done under controlled conditions.
The polar bears at the zoo live in a controlled environment.
First Known Use of controlled
CONTROLLED Defined for English Language Learners
Definition of controlled for English Language Learners
: not overly angry or emotional
: done or organized according to certain rules, instructions, or procedures
—used to describe a drug that is illegal to have or use without permission from a doctor
Medical Definition of controlled
: regulated by law with regard to possession and use controlled drugs
Seen and Heard
What made you want to look up controlled? Please tell us where you read or heard it (including the quote, if possible).