compass
noun uk/ˈkʌm.pəs/ us/ˈkʌm.pəs/
(DIRECTION DEVICE)
[ C ]指南针，罗盘
a device for finding direction with a needle that can move easily and that always points to magnetic north
(MEASURING DEVICE)
compasses [ plural ] 圆规，双脚规
a V-shaped device that is used for drawing circles or measuring distances on maps
You will need sharp scissors, a ruler, and a pair of compasses for making circles.
To draw a regular hexagon, begin by using compasses to draw a circle.
He used one end of the compasses to make a hole in the card.
You can see that the circle around the stamp was done with a pair of compasses.
She borrowed Andrew's compasses and drew a circle.
(LIMIT)
[ U ] formal（能力、活动、兴趣等的）界限，范围，范畴
a particular range (of ability, activity, interest, etc.)
It's a musical instrument made of brass, somewhat like a cornet and with a similar compass. 这是一件黄铜乐器，跟短号有些类似，音域也与之相近。
The discussion went beyond the compass of my brain. 讨论超出了我的理解能力。