noun
a title given to the wife of a king who has died and who is the mother of the new king or queen :
Queen Elizabeth, the Queen Mother
noun
a title given to the wife of a king who has died and who is the mother of the new king or queen :
Queen Elizabeth, the Queen Mother
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005