English Reference

Word

autonomous

Phoneticsau·ton·o·mous, stress on the second syllable

US/ɔˈtɑnəməs/

UK/ɔːtˈɒnəməs/

Definitions

01self-governing

C1 · Advanced Formal

adj. describes a country or region that has the power to govern itself independently.

adj. possessing the right or power of self-government; independent of external political control.

“The region became an autonomous province with its own local laws.”

“After years of negotiation, the territory was granted autonomous status, allowing it to manage its internal affairs while remaining part of the larger federation.”

Synonyms

independentsovereignself-governing

02independent in action

C1 · Advanced Academic

adj. able to make your own decisions and act without being told what to do by others.

adj. acting independently or having the freedom to do so; not controlled by others or outside forces.

“Teachers want their students to become autonomous learners who study on their own.”

“The philosophy department encourages students to be autonomous thinkers rather than simply memorizing the perspectives of established scholars.”

Synonyms

self-reliantfree

03self-operating technology

B2 · Upper Intermediate Computing Technical

adj. describes a machine or computer system that can operate without a human controlling it.

adj. capable of operating without direct human intervention, especially through the use of artificial intelligence.

“The company is testing autonomous cars that can drive safely in city traffic.”

“Advancements in sensor technology have allowed for the development of fully autonomous drones capable of navigating complex environments without a remote pilot.”

Synonyms

roboticautomatedself-driving

Antonyms

04impersonal verb forms

C2 · Proficiency Linguistics Technical

adj. in grammar, a verb form that does not have a specific person as the subject.

adj. denoting a verb form that lacks a specific subject, often functioning similarly to the passive voice in certain languages.

“In some languages, an autonomous verb form is used to show an action happened without saying who did it.”

“The Celtic languages utilize an autonomous verb form where the logical patient is the grammatical object, effectively creating an impersonal construction.”

Synonyms

Real-World Examples

“If it succeeds, CADRE will be the first time NASA has operated multiple rovers beyond Earth as a single autonomous system.”
Phys.org 15 Aug 2026
“Pokémon Go data was used to train military drones in autonomous navigation.”
The Guardian 11 Aug 2026
“Engineers could apply lessons from rhythmic ant swarms to autonomous artificial agents that also need to react as a group to cyclical changes in their environment.”
Phys.org 15 Aug 2026

Etymology

From autonomy + -ous.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

ADJECTIVE

autonomous(C1)

Domain

Linguistics

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.C1 AdvancedIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.7.0–8.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 5.0–5.595–113TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.945–990
Frequency
Frequent
Level
C1 · Advanced
Updated

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English Reference