Stockholm syndrome
noun
Stock·holm syndrome ˈstäk-ˌhō(l)m- 
: the psychological tendency of a hostage to bond with, identify with, or sympathize with his or her captor
Word History
Etymology
from a 1973 robbery attempt in Stockholm, Sweden, during which bank employees held hostage developed sympathetic feelings toward their captors
First Known Use
1978, in the meaning defined above
Medical Definition
Stockholm syndrome
noun
Stock·holm syndrome ˈstäk-ˌhō(l)m-
: the psychological tendency of a hostage to bond with, identify with, or sympathize with his or her captor