working-class (Adjective) — Of those who work for wages especially manual or industrial labourers. ex. "party of the working-class proletariat"
working-class (Adjective) — Working for hourly wages rather than fixed (e.g. annual) salaries. ex. "working-class occupations include manual as well as industrial labour"
working-class (Noun) — A social class comprising those who do manual labour or work for wages. ex. "there is a shortage of skilled working class in this field"