circular

1. ADJ Something that is circular is shaped like a circle. 圆形的

...a circular hole twelve feet wide and two feet deep. …一个12英尺宽、2英尺深的圆洞。

2. ADJ A circular journey or route is one in which you go to a place and return by a different route. (旅行或路线) 环行的

Both sides of the river can be explored on this circular walk. 沿着这条环形步行道走，河的两边就都可以看得到了。

3. N-COUNT A circular is an official letter or advertisement that is sent to a large number of people at the same time. 函件; 通告

The proposal has been widely publicized in press information circulars sent to 1,800 newspapers. 通过向1800份报纸发送新闻通告，这项提议得到了广泛地宣传。