to make sb/sth experience sth unpleasant :
The news plunged them into deep depression.
There was a flash of lightning and the house was plunged into darkness .
to make sb/sth experience sth unpleasant :
The news plunged them into deep depression.
There was a flash of lightning and the house was plunged into darkness .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005