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Congress of Industrial Organizations

noun

a federation of affiliated industrial labor unions, founded 1935 within the American Federation of Labor but independent of it 1938–55. Abbreviation: C.I.O., CIO

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for congress of industrial organizations

Congress of Industrial Organizations

noun

(in the US) a federation of industrial unions formed in 1935. It united with the AFL in 1955 to form the AFL-CIOAbbreviation: CIO
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