the labour of workers who are not members of trade unions
such workers collectively
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Examples from the Web for free labour
Historical Examples of free labour
They seemed clannish, too, with an unemployed or free-labour sort of isolation.Over the Sliprails
He would still exclude slave-labour sugar; but on free-labour sugar, the differential duties would be reduced from lis.The History of England in Three Volumes, Vol.III.
E. Farr and E. H. Nolan