Meaning of CIRCULAR in English

■ adjective

1》 having the form of a circle.

2》 Logic (of an argument) already containing an assumption of what is to be proved.

3》 (of a letter or advertisement) for distribution to a large number of people.

■ noun a ~ letter or advertisement.


~ity noun

~ly adverb

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.