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

Synonyms of uncontrolled

• rampant
• runaway

Examples of uncontrolled in a Sentence

a tirade filled with uncontrolled anger about what the government was doing

Recent Examples on the Web

But over time, skipped doses can lead to uncontrolled blood pressure, which can damage your heart and blood vessels. —Jessica Swirble, Verywell Health, 24 Apr. 2026

These are caused by uncontrolled spasms of the vocal cords, which affect the ability to produce a consistent sound. —Mary Walrath-Holdridge, USA Today, 23 Apr. 2026

Nearly in sync, a third emerges, prompting a chorus of uncontrolled squeals and giddy laughter. —Hannah Towey, Condé Nast Traveler, 22 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

Word History

First Known Use

circa 1535, in the meaning defined above

Rhymes for uncontrolled

• ahold
• behold
• billfold
• blindfold
• cajoled
• consoled
• controlled
• cotswold
• eightfold
• enfold
• enrolled
• extolled

Medical 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