SHAPE 形状, a completely round shape, like the letter O

圆（形）:

Draw a circle 10cm in diameter.

画一个直径 10 厘米的圆。

Cut the pastry into circles.

将油酥面团切成圆形。

ARRANGED IN CIRCLE 排成圈, a group of people or things arranged in the shape of a circle

排成一圈的人（物）:

The children stood round in a circle .

孩子们站成一圈。

a circle of chairs

一圈椅子

GROUP OF PEOPLE 人群, a group of people who know each other and meet regularly, or who have similar interests or jobs

…圈子，…界:

a circle of friends

朋友圈子

circles He's well-known in fashionable circles .

他在时装界是个知名人物。

Johnson was part of the president's inner circle (=the people who have the most influence) .

约翰逊是总统核心集团的人。

THEATRE 剧院, [BrE] the upper floor of a theatre, that has seats arranged in curved rows

〔有半圆形楼座的〕楼厅包厢;

go / run around in circles, to think or argue about something without deciding anything or making progress

在原地兜圈子; 白忙，瞎忙

come / go full circle also turn full circle, [BrE] to end in the same situation in which you began, even though there have been changes in the time in between

循环，兜了一圈回到原处:

Sooner or later, fashion comes full circle.

时尚兜一个圈子回到原处是迟早的事。

[T] to draw a circle around something

围绕; 在…上画圈; 圈出:

Circle the correct answer.

将正确答案圈出来。

[I,T] to move in the shape of a circle around something, especially in the air

〔尤指在空中〕（绕…）盘旋:

The plane circled the airport before landing.

飞机着陆前在机场上空盘旋。

The pigeons circled above the terrace.

鸽子在平台上方盘旋。