Outlawed means to officially prohibit or make something illegal. If child labor was outlawed during the Industrial Revolution, it would mean that laws and regulations were put in place to prevent children from being employed in harmful working conditions.
Related terms
Labor legislation: Laws created by governments to protect workers' rights and regulate working conditions.
International Labour Organization (ILO): A United Nations agency that sets labor standards and promotes social justice worldwide.
Sweatshops: Factories or workshops with poor working conditions, low wages, and often employing underage workers.