[n] a social class comprising those who do manual labor or work for wages; "there is a shortage of skilled labor in this field"
[adj] of those who work for wages especially manual or industrial laborers; "party of the propertyless proletariat"- G.B.Shaw
[adj] working for hourly wages rather than fixed (e.g. annual) salaries; "working-class occupations include manual as well as industrial labor"