Main entry: low-class, lower-class
Definition: occupying the lowest socioeconomic position in a society
Antonyms: middle-class
Definition: occupying a socioeconomic position intermediate between those of the lower classes and the wealthy
Antonyms: upper-class
Definition: occupying the highest socioeconomic position in a society
Antonyms: white-collar
Definition: of or designating salaried professional or clerical work or workers