circular · adjective /ˈsɜr.kjə.lər/Full view
Nouns: circle, circular, circulation, semicircle
Adjectives: circular, semicircular
Verbs: circle, circulate
circular (SHAPE)
B2 shaped like a circle
Dictionary example:

a circular rug

Learner example:

People who congratulate the marrying [couple] take a circular sweet. (Preliminary English Test; B1; Turkish)

circular (ARGUMENT)
C2 used to describe an argument which keeps returning to the same points and is not effective
Dictionary example:

a circular argument/theory

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