a device for finding direction with a needle that can move easily and that always points to magnetic north

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.

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。