Learner's definition of COMPASS
1 [count] : a device that is used to find direction by means of a needle that always points north 2 [count] : something that helps a person make choices about what is right, effective, etc.
His religion is the compass that guides him.
Interest rates serve as a compass for determining whether to buy or sell stocks.
The character in the movie had no moral compass to tell him that stealing was wrong.
3 a : a tool that consists of two pointed sticks joined at the top and that is used for measuring distances— often plural b : a tool that consists of a pen or pencil attached to a pointed stick and that is used for drawing circles 4 [noncount] : a specialized area of knowledge, skill, experience, etc.— often used after beyond or within