English Reference

Word

circular

Phoneticscir·cu·lar, stress on the first syllable

US/ˈsɝkjəɫɝ/

UK/sˈɜːkjʊlɐ/

Definitions

01shape or motion

B1 · Intermediate

adj. having the shape of a circle or moving in a circle.

adj. pertaining to the shape of a circle or movement along a curved path that returns to its starting point.

“The children sat in a circular formation on the rug for story time.”

“The satellite maintains a stable circular orbit around the planet, ensuring consistent data collection for the meteorological team.”

Antonyms

02indirect or roundabout

B2 · Upper Intermediate

adj. not going directly to a point; taking a long way around.

adj. circuitous or indirect in path or reasoning.

“We took a circular route through the park to see all the gardens.”

“The hikers followed a circular trail that led them back to the trailhead after passing the waterfall and the ridge.”

Synonyms

roundaboutcircuitousindirect

Antonyms

03logic/reasoning

C1 · Advanced Academic

adj. describing an argument that uses its own conclusion as a reason why it is true.

adj. referring to a line of reasoning where the conclusion is already assumed in the premises, creating a logical loop.

“His argument was circular because he just repeated his main point in different words.”

“The philosopher critiqued the author's circular reasoning, noting that the initial assumption was identical to the final conclusion.”

Synonyms

recursivetautological

04printed notice

B2 · Upper Intermediate Countable noun

n. a letter or advertisement that is sent to many people at the same time.

n. a printed advertisement, notice, or directive intended for wide distribution to a specific group or the general public.

“The supermarket sends out a weekly circular with all the latest discounts.”

“The local council distributed a circular to every household explaining the changes to the recycling collection schedule.”

Synonyms

leafletflyerhandbill

05clothing

C2 · Proficiency Countable noun Archaic

n. a type of coat or cape without sleeves that is cut in a round shape.

n. a sleeveless cloak or cape constructed from a circular pattern of fabric.

“The character in the old play wore a heavy wool circular to stay warm.”

“The museum's costume collection includes a velvet circular from the mid-nineteenth century, remarkably well-preserved despite its age.”

Synonyms

Collocations

Common phrases and expressions where native English speakers use the word “circular” in context.

01. circular economy

Real-World Examples

“Circular RNA has attracted attention as a way to overcome the instability of conventional linear mRNA.”
Phys.org 14 Aug 2026
“Feel around each breast or side of your chest in a circular motion all the way up to your collarbone and under each armpit.”
BBC News 12 Aug 2026
“The intron RNA survived because it forms a circular molecule with no open ends.”
ScienceDaily 5 Aug 2026
“Evans compared its divided circular body to a "bathmat" or "pancake." Funisia was a stationary, tube-shaped organism that lived in clusters of similarly sized individuals.”
ScienceDaily 6 Aug 2026

Etymology

From Middle English circuler, circuleer, circulere, from Old French circulier (French circulaire), from Late Latin circularis, from Latin circulus, diminutive of circus (“ring”). By surface analysis, circle + -ar.

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

Word family

ADJECTIVE

circular(C1)

Idioms

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

QR code

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English Reference