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

Tribbles are a metaphor for uncontrolled activities of humanity. — Bryan Alexander, USA Today, 8 Aug. 2026

Defining borders and creating uncontrolled competition between countries isn’t helpful in facing and solving the issues presented by frontier AI. — Shlomo Kramer, Fortune, 7 Aug. 2026

Their venom disrupts blood clotting and can cause uncontrolled bleeding, shock, kidney damage, and organ failure. — Atharva Gosavi, Interesting Engineering, 6 Aug. 2026

While adding a tiny amount of salt to your coffee is generally safe, people on a low-salt diet or those with uncontrolled high blood pressure should consult a healthcare provider to see if this is a wise choice for them. — Megan Nunn, Verywell Health, 6 Aug. 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