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Of superior grade or quality.
of a higher than average standard or quality
adj., v. -grad•ed, -grad•ing. adj.
1. of excellent or superior quality.
2. (of ore) yielding a large amount of the metal for which it is mined.v.t.
3. to steal (rich ore) from a mine.
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|Adj.||1.||high-grade - surpassing in quality; "top-grade ore"|
best - (superlative of `good') having the most positive qualities; "the best film of the year"; "the best solution"; "the best time for planting"; "wore his best suit"