noun
1.
one of a line of flat stones that you step on in order to cross a stream or river
2.
something that allows you to make progress or begin to achieve sth :
a stepping stone to a more lucrative career
noun
1.
one of a line of flat stones that you step on in order to cross a stream or river
2.
something that allows you to make progress or begin to achieve sth :
a stepping stone to a more lucrative career
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005