柯林斯词典serf /sɜːf/ (serfs) 1. N-COUNT In former times, serfs were a class of people who had to work on a particular person's land and could not leave without that person's permission. 农奴 返回 serf剑桥词典a member of a low social class in medieval times who worked on the land and had to obey the person who owned that land （中世纪的）农奴 返回 serf