Same as trade-union. See etymology of trade-union.(noun)
The Century Dictionary (Public Domain)
Use "trades-union" in a sentence
"Every broken strike in recent years, every legally plundered trades-union treasury, every closed shop made into an open shop, has driven the members of the working-class directly hurt over to socialism by hundreds and thousands."
"The corporation and the trades-union have forgotten that they are the creatures of the state."
"But another element in the trades-union situation must be reckoned with if trades-unionism is to be saved."