I. cir ‧ cu ‧ lar 1 /ˈsɜːkjələ, ˈsɜːkjʊlə $ ˈsɜːrkjələr/ BrE AmE adjective
[ Word Family: noun : ↑ circle , ↑ semicircle , ↑ circulation ; adjective : ↑ circular , ↑ semicircular , ↑ circulatory ; verb : ↑ circle , ↑ circulate ]
[ Date: 1300-1400 ; Language: Old French ; Origin: circuler , from Late Latin circularis , from Latin circulus ; ⇨ ↑ circle 1 ]
1 . shaped like a circle:
a circular table
2 . moving around in a circle:
a circular bus route
3 . circular argument/logic/reasoning an argument or way of thinking that is not right because the statement it uses to prove that the argument is true can only be true if the original argument is already true
—circularity /ˌsɜːkjəˈlærəti, ˌsɜːkjʊˈlærəti $ ˌsɜːr-/ noun [uncountable]
II. circular 2 BrE AmE noun [countable]
a printed advertisement, notice etc that is sent to lots of people at the same time
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THESAURUS
■ describing types of shapes
▪ square shaped like a square:
a square box
▪ circular/round shaped like a circle:
a circular table
▪ semicircular shaped like a semicircle:
a semicircular arch above the door
▪ triangular shaped like a triangle:
sails divided into triangular sections
▪ rectangular shaped like a rectangle:
a simple rectangular building
▪ oval shaped like an oval:
an oval swimming pool
▪ cylindrical shaped like a cylinder:
The statue is on top of a tall cylindrical column.
▪ spherical shaped like a ball:
The planet Saturn is not completely spherical.