| 1. | having the form of a circle; round: a circular tower. |
| 2. | of or pertaining to a circle: a circular plane. |
| 3. | moving in or forming a circle or a circuit: the circular rotation of the earth. |
| 4. | moving or occurring in a cycle or round: the circular succession of the seasons. |
| 5. | roundabout; indirect; circuitous: a circular route. |
| 6. | Logic. of or pertaining to reasoning in which the conclusion is ostensibly proved, but in actuality it or its equivalent has been assumed as a premise. |
| 7. | pertaining to a circle or set of persons. |
| 8. | (of a letter, memorandum, etc.) addressed to a number of persons or intended for general circulation. |
| 9. | a letter, advertisement, notice, or statement for circulation among the general public. |