1. Of or relating to a circle.
a. Shaped like or nearly like a circle; round.
b. Moving in or forming a circle.
3. Circuitous; roundabout: took a circular route to the office.
4. Using a premise to prove a conclusion that in turn is used to prove the premise: a circular argument.
5. Defining one word in terms of another that is itself defined in terms of the first word.
6. Addressed or distributed to a large number of persons.
A printed advertisement, directive, or notice intended for mass distribution.
[Middle English circuler, from Anglo-Norman, from Latin circulāris, from circulus, circle; see CIRCLE.]
cir′cu·lari·ty (-lărĭ-tē) n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.