Industrial Workers of the Worldor IWW. a former international labor union and radical labor movement in the United States; founded in Chicago in 1905 and dedicated to the overthrow of capitalism;. The Industrial Workers of the World (IWW), members of which are commonly termed "Wobblies", is an international labor union that was founded in 1905 in Chicago, Illinois, in the United States. IWW definition: Industrial Workers of the World | Meaning, pronunciation, translations and examples. What is the definition of IWW? What is the meaning of IWW? How do you use IWW in a sentence? What are synonyms for IWW?.