Meanings

middle class

superior court

geometric series

highest or finest quality sake

special class for disabled children

privileged class

school for the disabled

working class

intellectual class

ruling classes

luxury car

arithmetical progression

class that combines students of two or more grade levels

wind velocity scale

to keep (a student) back (to repeat a grade)

ambassador-level conference

first-degree murder (in US, etc. law)

special grade article

(school) grade

lower court