"Mortmain" refers to a legal concept in medieval England that involves property owned by a corporation or religious institution, which cannot be freely transferred or inherited. The term literally means "dead hand," indicating that the property is effectively controlled by a deceased person or entity, limiting its use and transferability. This concept was significant in the context of feudalism and land ownership, as it prevented the redistribution of land and wealth. Mortmain laws were enacted to curb the accumulation of land by churches and monasteries, ensuring that property remained within the hands of the living and could be taxed or utilized for public benefit.