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

For airports in uncontrolled airspace, drones must not fly more than 400 feet above the ground. — Christopher Edwards, PEOPLE, 29 June 2026

That data can be retained and used in future ways, unknown and uncontrolled by those whose biometric data has been collected. — Anne Toomey McKenna, The Conversation, 30 June 2026

The derailment was the second deadly crash involving an Amtrak train at an uncontrolled crossing in as many days. — The Kansas City Star, Kansas City Star, 25 June 2026

These conditions will promote extreme fire behavior in an area already dealing with large uncontrolled wildfires. — Kyle Reiman, ABC News, 27 June 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