What is the meaning of "honours degree"?

An honours degree is a grading classification in the United Kingdom that distinguishes achievements of undergraduates. An degree with honours denotes a degree in a given subject that required a higher level of academic learning and achievement.

Honours awards are given in levels in the United Kingdom based on the percentage level of a student's passing grade in the course. For instance, those in an open university that achieve a degree in the top 85 percent of their class receive a First-Class Honours classification. Honors programs in the United States are similar, with honors classes requiring a higher level of study and GPA requirements.