noun
a large block of stone that is put at the base of an important new public building in a special ceremony :
to lay the foundation stone of the new museum
noun
a large block of stone that is put at the base of an important new public building in a special ceremony :
to lay the foundation stone of the new museum
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005