'lower-middle-class' definitions:

Definition of 'lower-middle-class'

(from WordNet)
adjective
Occupying the lower part of the middle socioeconomic range in a society

Definition of 'lower-middle-class'

From: GCIDE
  • lower-middle-class \lower-middle-class\ adj. occupying the lower part of the middle socioeconomic range in a society. [WordNet 1.5]