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

The fires are spreading across Manitoba, Saskatchewan and Ontario; most remain completely uncontrolled. — Chelsea Gohd, Space.com, 17 July 2026

The Amylyx drug, avexitide, is being developed to halt severe, uncontrolled drops in blood sugar that some people experience after undergoing stomach-reducing surgery for weight loss. — Adam Feuerstein, STAT, 16 July 2026

That mission suffered an uncontrolled landing of its booster in the Gulf that ultimately led to the rocket’s grounding by the Federal Aviation Administration. — Richard Tribou, The Orlando Sentinel, 16 July 2026

There are several risk factors for aortic dissection, including chronic, uncontrolled high blood pressure. — Emily Kay Votruba, EverydayHealth.com, 13 July 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