Search Result for "middle-class": 
Wordnet 3.0

ADJECTIVE (1)

1. occupying a socioeconomic position intermediate between those of the lower classes and the wealthy; 



WordNet (r) 3.0 (2006):

middle-class
    adj 1: occupying a socioeconomic position intermediate between
           those of the lower classes and the wealthy [ant: low-
           class, lower-class, upper-class]