unionism
noun
union·ism ˈyün-yə-ˌni-zəm 
: the principle or policy of forming or adhering to a union: such as
a
capitalized : adherence to the policy of a firm federal union between the states of the United States especially during the Civil War period
b
: the principles, theory, advocacy, or system of trade unions
Example Sentences
Recent Examples on the Web With unionism sweeping the nation right now, and a new generation of young workers embracing the old ideal of solidarity, Biden has ensured that a veto would be a stain on Newsom’s progressive credentials, now and in the future. 
Anita Chabria, Los Angeles Times, 6 Sep. 2022 Shuler: Wisconsin has a storied tradition of worker activism and unionism. Ricardo Torres, Journal Sentinel, 2 Sep. 2022 Support for Scottish independence and unionism remains split down the middle. Karla Adam, Washington Post, 28 June 2022 Their rank-and-file model of unionism—by us, for us—demanded hours of work outside of work, and everyone at the table admitted to exhaustion. E. Tammy Kim, The New Yorker, 2 Aug. 2022 Several members were drawn to trade unionism, involving themselves, for instance, in the garment workers strike of 1909. BostonGlobe.com, 29 July 2022 Though unionist when founded, the Alliance Party has become neutral on unionism, and now appeals to Catholic voters too. Shafi Musaddique, The Christian Science Monitor, 28 June 2022 In the glory days of trade unionism in the 1960s and 1970s, the labor situation periodically turned nasty, and there was rock-throwing violence. Matt Durot, Forbes, 4 June 2022 In a place where color carries huge weight — green signifies Catholic nationalism, orange Protestant unionism — the Giants chose a soothing and apolitical teal for their uniforms. Brian T. Brown, NBC News, 15 May 2022 See More
Anita Chabria, Los Angeles Times, 6 Sep. 2022 Shuler: Wisconsin has a storied tradition of worker activism and unionism. Ricardo Torres, Journal Sentinel, 2 Sep. 2022 Support for Scottish independence and unionism remains split down the middle. Karla Adam, Washington Post, 28 June 2022 Their rank-and-file model of unionism—by us, for us—demanded hours of work outside of work, and everyone at the table admitted to exhaustion. E. Tammy Kim, The New Yorker, 2 Aug. 2022 Several members were drawn to trade unionism, involving themselves, for instance, in the garment workers strike of 1909. BostonGlobe.com, 29 July 2022 Though unionist when founded, the Alliance Party has become neutral on unionism, and now appeals to Catholic voters too. Shafi Musaddique, The Christian Science Monitor, 28 June 2022 In the glory days of trade unionism in the 1960s and 1970s, the labor situation periodically turned nasty, and there was rock-throwing violence. Matt Durot, Forbes, 4 June 2022 In a place where color carries huge weight — green signifies Catholic nationalism, orange Protestant unionism — the Giants chose a soothing and apolitical teal for their uniforms. Brian T. Brown, NBC News, 15 May 2022 See More Word History
First Known Use
1831, in the meaning defined above