circular
gb/sˈɚkjəlɚ/ us/sˈɚkjəlɚ/
A2
英語
~ 7400
語義
0件の語義
adjective
A2
property
1
shaped like a circle or disk
Having a round, circle-like shape.
用法パターン：
a circular [object]
よくある間違い：
Learners sometimes use "circle" instead of "circular" before a noun, saying *a circle table* instead of *a circular table*. Use "circular" to describe the shape of the noun and "a circle" when the noun itself is the shape, as in *draw a circle*.
類義語
round (More general and common; can also describe spheres or vague roundness, not only flat circle shapes.)
対義語
square (Describes a shape with four equal straight sides and right angles, contrasting with a smooth, curved circular shape.)
コロケーション
circular table
|circular window
|circular hole
|circular frame
|circular logo
|circular plate
テーマ
geometry
|description
|objects
|core_vocabulary
|space
例文
- They sat around a large circular table in the meeting room.
- The architect suggested a circular window to let in more light.
- She wore a simple necklace with a small circular pendant.
- The cake came in a circular tin that was hard to open.
- A circular mirror hung above the fireplace.
学習者向け例文
- The children sat in a circular space on the floor.
- We bought a circular rug for the living room.
- There is a circular hole in the wall.
- I like this circular plate more than the square one.
- The coin has a smooth circular edge.
unknown
B1
property
2
moving or arranged in a circle
Going in or making a round path, not straight.
用法パターン：
a circular [route / path / movement]
よくある間違い：
Learners sometimes say *circle route* or *round route* instead of *circular route*. Use "circular" before nouns like "route", "path", and "track" to describe a path that goes around and returns to the starting point.
類義語
roundabout (Often suggests an unnecessarily long or indirect route; "circular" is more neutral and geometric.)
対義語
straight (Describes a direct line or route with no curve, opposite of a circular or curved path.)
コロケーション
circular route
|circular path
|circular movement
|circular tour
|circular track
テーマ
travel
|movement
|space
例文
- We took a circular route through the park and ended up back at the gate.
- The runners trained on a circular track outside the stadium.
- The satellite follows a nearly circular orbit around the Earth.
- The dancers moved in a slow circular pattern around the stage.
- The hiking trail is circular, so you finish where you started.
学習者向け例文
- The bus goes on a circular route around the city.
- We walked on a circular path by the lake.
- The planet moves in a circular line around the sun.
- The cars drove in a circular way around the fountain.
- The race takes place on a circular track.
adjective
technical
C1
property
3
using faulty self‑supporting logic
Describing an argument that is bad because it uses its own conclusion as a reason to believe that conclusion.
用法パターン：
a circular [argument / explanation / definition]
よくある間違い：
Learners sometimes confuse "circular" with "cycle" or "cyclical" and think it only means "repeated many times". In logic, a "circular argument" is wrong because it uses its own conclusion as a reason, not just because the discussion goes in circles.
類義語
self‑referential (Focuses on referring to itself; "circular" specifically emphasizes faulty logical structure.)
対義語
logical (Describes reasoning that follows valid rules and does not rely on its own conclusion as proof.)
コロケーション
circular argument
|circular reasoning
|circular logic
|circular explanation
|circular definition
テーマ
logic
|education
|communication
例文
- The lawyer objected that the testimony was based on a circular argument.
- Her explanation of success was circular, saying that rich people win because winners are rich.
- The philosopher pointed out the circular reasoning in the theory.
- The committee rejected the proposal because its justification was obviously circular.
- A good definition should not be circular or simply repeat the word being defined.
学習者向け例文
- The teacher said my answer was a circular argument.
- His idea uses circular reasoning, so it is not strong.
- The example in the book is bad because the logic is circular.
- She gave a circular explanation that did not really explain anything.
- We learned not to use circular definitions in our essays.
adjective
B2
property
4
operating in a closed, repeating cycle
Describing a system where things go in a loop and are used again instead of being thrown away or stopped.
用法パターン：
a circular [process / system / model / economy]
よくある間違い：
Learners sometimes think "circular economy" means an economy that goes around in circles without progress. Here, "circular" refers to materials and products being reused and recycled in a loop, in contrast to a "linear" model of take‑make‑waste.
類義語
cyclical (Emphasizes regular repeating cycles; "circular" often highlights closed loops and reuse, especially in economics and sustainability.)
対義語
linear (Describes a one‑way process moving from start to end without looping back or reusing outputs.)
コロケーション
circular economy
|circular system
|circular process
|circular model
|circular flow
テーマ
business
|environment
|science
|technology
例文
- Many governments are promoting a circular economy to reduce waste.
- The company redesigned its supply chain to create a more circular system.
- In a circular process, materials are recovered and fed back into production.
- The report argues that circular business models can be profitable and sustainable.
- Water in the plant is used in a circular loop instead of being released after one use.
学習者向け例文
- They want to build a circular economy with less waste.
- A circular system uses things again and again.
- In this circular process, old parts become new products.
- The new plan is more circular and better for the environment.
- A circular model is not a straight line; it is like a loop.
名詞
formal
B2
entity
5
letter or notice sent widely
A paper or email message that is sent to many people at once, usually with the same text.
用法パターン：
send a circular to [people / members / customers]
よくある間違い：
Learners sometimes confuse "circular" (noun) with the adjective and say *send a circular letter paper* instead of simply *send a circular*. As a noun, "a circular" already means a letter or notice sent to many people.
類義語
flyer (Usually an advertising sheet given to the public; not always used for official internal communication like some circulars.)
対義語
personal letter (A message written for one specific person, not a standard text sent to many people.)
コロケーション
send a circular
|issue a circular
|distribute a circular
|government circular
|internal circular
|advertising circular
テーマ
business
|communication
|administration
例文
- The school sent a circular to all parents about the new rules.
- Staff received an internal circular explaining the policy change.
- Residents complained about the number of advertising circulars left in their mailboxes.
- The ministry issued a circular to local authorities on how to apply the new law.
- A colorful circular from the supermarket listed the weekly discounts.
学習者向け例文
- Our company sent a circular to all workers.
- I got a shopping circular in the mail today.
- The teacher read an important circular from the school office.
- The government wrote a circular to every hospital.
- They printed many circulars and gave them to people on the street.
文法
辞書形
circular
IPA
GB/sˈɚkjəlɚ/
US/sˈɚkjəlɚ/
音節・強勢
cir - cu - lar （3音節）
Stress on 1st syllable (cir)
活用形
Adjective
- Base: circular
Noun
- Base: circular
- Plural: circulars
関連語
Forms
circulars
noun
Core family
circle
noun A2
circularly
adverb
Related words
Advanced or less common
circularity
noun C1
表現
circular argument
1/sˈɚkjəlɚ ˈɑɹɡjəmənt/
fixed phrase
an argument that proves itself
A bad argument that tries to prove something by using that same thing as a reason.
例文
- Saying "I am right because I am never wrong" is a circular argument.
- The professor asked the class to find the circular argument in the article.
- Their defense of the policy was just a circular argument that repeated the conclusion.
circular economy
1/sˈɚkjəlɚ ɪkˈɑnəmi/
fixed phrase
economic system based on reuse and recycling
An economic system where products, parts, and materials are used again and again, instead of being thrown away after one use.
例文
- Many cities are trying to move from a linear model to a circular economy.
- A circular economy can reduce waste and create new jobs in recycling and repair.
circular letter
1/sˈɚkjəlɚ lˈɛtɚ/
fixed phrase
formal
standard letter sent to many people
A letter that is copied and sent to many people with the same message.
例文
- The company sent a circular letter to all clients announcing the change of address.
- Members received a circular letter explaining the new membership rules.
circular reasoning
1/sˈɚkjəlɚ ɹˈizənɪŋ/
fixed phrase
faulty logic using itself as proof
Thinking in a wrong way where your reason and your answer are basically the same thing.
例文
- The article is full of circular reasoning and never gives real evidence.
- Teachers often warn students to avoid circular reasoning in their essays.
circular saw
1/sˈɚkjəlɚ sˈɔ/
fixed phrase
power tool with a round blade
A power tool with a fast-spinning round blade that is used to cut wood and other materials.
例文
- He used a circular saw to cut the wooden boards.
- Always wear safety glasses when operating a circular saw.