circular

Short definition from Wiktionary

Adjective

1. 1
   Of or relating to a circle.
2. 2
   In the shape of, or moving in a circle.
3. 3
   Circuitous or roundabout.
4. 4
   Referring back to itself, so as to prevent computation or comprehension; infinitely recursive.
5. 5
   Distributed to a large number of persons.
6. 6
   Perfect; complete.
7. 7
   Adhering to a fixed circle of legends; cyclic; hence, mean; inferior.

Noun

1. 1
   An advertisement, directive or notice intended for mass circulation.
2. 2
   Ellipsis of circular letter.
3. 3
   Ellipsis of circular file.
4. 4
   A sleeveless cloak cut from a circular pattern.
5. 5
   A shuttle bus with a circular route.

Verb

1. 1
   To distribute circulars to or at.
2. 2
   To extend in a circular direction.