uncontrolled
adjective
un·con·trolled
ˌən-kən-ˈtrōld 
: not controlled: such as
a
: happening or done without being stopped, slowed, or controlled
an uncontrolled tantrum
his uncontrolled anger
uncontrolled hypertension
uncontrolled urban sprawl
b
: not conducted or maintained in accordance with fixed rules, restraints, or procedures
results from an uncontrolled study
c
: not regulated by law with regard to possession and use
uncontrolled substances
Examples of uncontrolled in a Sentence
a tirade filled with uncontrolled anger about what the government was doing
Recent Examples on the Web
During the frenzied police response, an Idaho State Patrol trooper deployed a drone that flew off uncontrolled.
—
Nick Penzenstadler, USA Today, 19 Apr. 2026
Structural risks with the confinement system An uncontrolled failure of this internal shell would release large quantities of radioactive particles.
—Aman Tripathi, Interesting Engineering, 15 Apr. 2026
In some cases, this can increase inflammation and lead to sepsis, a condition where the body’s response to infection becomes dangerously uncontrolled, damaging tissues and sometimes leading to organ failure.
—Panteha Torabian, The Conversation, 14 Apr. 2026
High blood pressure is treatable, but despite having access to effective and affordable medications, more than half of Americans still have uncontrolled hypertension, with rates going up in sync with adverse social determinants of health.
—Elizabeth Cooney, STAT, 8 Apr. 2026
See All Example Sentences for uncontrolled
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Nick Penzenstadler, USA Today, 19 Apr. 2026
Structural risks with the confinement system An uncontrolled failure of this internal shell would release large quantities of radioactive particles.
—Aman Tripathi, Interesting Engineering, 15 Apr. 2026
In some cases, this can increase inflammation and lead to sepsis, a condition where the body’s response to infection becomes dangerously uncontrolled, damaging tissues and sometimes leading to organ failure.
—Panteha Torabian, The Conversation, 14 Apr. 2026
High blood pressure is treatable, but despite having access to effective and affordable medications, more than half of Americans still have uncontrolled hypertension, with rates going up in sync with adverse social determinants of health.
—Elizabeth Cooney, STAT, 8 Apr. 2026
See All Example Sentences for uncontrolled
Cite this Entry
“Uncontrolled.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/uncontrolled. Accessed 22 Apr. 2026.
Copy CitationMedical Definition
uncontrolled
adjective
un·con·trolled
ˌən-kən-ˈtrōld
1
: not being under control
uncontrolled hypertension
2
: not incorporating suitable experimental controls
uncontrolled drug trials
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