I. ˈ ̷ ̷| ̷ ̷ adjective
Etymology: high grade
: of superior grade or quality
high-grade writing
high-grade manganese
as
a. : being securities or other investments involving little or no risk and affording a relatively assured income
high-grade bonds
b. : being near the upper extreme of the range in which it may occur
a high-grade moron approaches normality
a high-grade hydrocephalic exhibits maximum deformity
— compare low-grade
II. transitive verb
Etymology: high grade
: to steal (rich ore) from a mine ; also : to mine only (the rich ore)
• high-grader ˈ ̷ ̷| ̷ ̷ ̷ ̷ noun
• high-grading ˈ ̷ ̷| ̷ ̷ ̷ ̷ noun