'blue-collar' definitions:

Definition of 'blue-collar'

From: WordNet
adjective
Of or designating manual industrial work or workers [ant: white-collar]
adjective
Of those who work for wages especially manual or industrial laborers; "party of the propertyless proletariat"- G.B.Shaw [syn: propertyless, wage-earning, working-class, blue- collar]

Definition of 'blue-collar'

From: GCIDE
  • blue-collar \blue-collar\ adj.
  • 1. of or designating work or workers in industry not requiring well-groomed appearance. [Narrower terms: industrial] white-collar [WordNet 1.5]
  • 2. of those who work for wages especially manual or industrial laborers. [Narrower terms: {lower-class, low-class}]
  • Syn: propertyless, wage-earning, working-class. [WordNet 1.5]