English definition of “grade”
/greɪd/ noun [C]
SCORE › a number or letter that shows how good someone's work or performance is: Steve never studies, but he always gets good grades.UK Carla got a grade A in German.
LEVEL › a level of quality, size, importance, etc: I applied for a position a grade higher than my current job.
SCHOOL GROUP US › a school class or group of classes for students of the same age or ability: My son is in fifth grade.