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| Date: | 1300-1400 |
| Language: | Old French |
| Origin: | circuler, from Late Latin circularis, from Latin circulus; CIRCLE1 |
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cir‧cu‧lar1
1 shaped like a circle : 
a circular table
a circular table2 moving around in a circle : a circular bus route
a circular bus route3 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
circular argument/logic/reasoning
—circularity noun [uncountable]
noun [uncountable]