white knight noun
plural white knights
plural white knights
Learner's definition of WHITE KNIGHT
[count]
: someone or something that rescues or saves another person or thing from a bad situation
especially : a company that buys a second company in order to prevent it from being taken over by a third company白衣骑士；救星；（尤指）为防止某公司被另一公司接管而对其收购的公司