The Oxford Thesaurus An A-Z Dictionary of Synonyms - circularadj.

1) round, disc-shaped or chiefly US disk-shaped, disc-like or chiefly US disk-like, discoid; ring-shaped, ring-like, annular: Notice the circular pattern of growth of this ivy. 2) roundabout, indirect, circuitous, tortuous, twisting, twisted, anfractuous; periphrastic, circumlocutory; devious: We had to take a circular route because the road was closed. Why can't she say what she means instead of being so circular? 3 illogical, inconsistent, redundant, fallacious, irrational, Formal sophistic or sophistical: To say that you exist because you think and that you think because you exist is an example of circular reasoning.