noun

a particular level of rank, quality, proficiency, or value.

sea salt is usually available in coarse or fine grades

category,class,classification,grouping,group,set,section,bracket,division,type,brand

verb

arrange in or allocate to grades; classify or sort.

the timber is graded according to its thickness

classify,class,categorize,bracket,sort,group,order,arrange,type,pigeonhole,brand,size,rank,evaluate,rate,value,range,graduate,calibrate