B2a level of quality, size, importance, etc.: He's suffering from some kind of low-grade (= slight) infection, which he can't seem to get rid of.There's some really high-grade (= high quality) musicianship on this recording.Bill has been on (USat) the same grade (= his job has been of the same level of importance, or he has had the same level of pay) for several years now.Quality and standardB1a number or letter that shows how good someone's work or performance is: Steve never studies, but he always gets good grades.UKCarla got a grade A in German.Marks and results