A jurist is someone who is an expert in details of the legal system. Sometimes the word jurist is used to refer specifically to a lawyer or judge. If you love the law, you might want to be a jurist one day.
If you become a jurist, you'll be a scholar who has studied the details and theories of law. You might work as a newspaper's legal expert or a college professor. In the U.S., it's common to refer to a judge or another legal professional as a jurist. So you might describe the Chief Justice of the Supreme Court as the top jurist in the country. Jurist comes from the Latin ius, "a right or a law."