Enjoin/ɪnˈdʒɔɪn/ Definition 1 of 2Pro Tip 1/3Legal Authority Used when a court or authority issues a formal order that must be followed. The agency was enjoined to comply with the environmental regulations. Pro Tip 2/3Restrictive Action Implies a prohibition against a specific action or behavior. Activists were enjoined from holding a protest in the private park. Pro Tip 3/3Weighty Consequences Carries a sense of urgency because disobeying may lead to legal penalties. The company was enjoined from using the patented process.