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

According to Katalyst, the satellite has a 50% chance of making an uncontrolled reentry by mid-2026 without intervention, with those odds increasing to 90% by the end of 2026. — Eric Lagatta, USA Today, 28 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

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

The home kit industry is, in effect, conducting an uncontrolled experiment in community-level antibiotic pressure, without trial registration, without safety monitoring, and without informed consent from the populations who will bear the downstream burden. — Robert Glatter, Forbes.com, 23 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