1. forms or joins a labor union; organizes workers into a union
Usage: third person singular present tense of unionize

Examples

• The factory unionizes its workers to negotiate better wages.
• She unionizes employees at various companies across the state.
• The company resists when the workforce unionizes.
• He unionizes restaurant workers to improve working conditions.
• The organization unionizes teachers in rural school districts.
• Management often opposes when labor unionizes.
• The activist unionizes retail workers for collective bargaining.