noun
[ U ] the process by which a person's character and abilities are developed :
Staff are encouraged to use the library for professional self-development.
noun
[ U ] the process by which a person's character and abilities are developed :
Staff are encouraged to use the library for professional self-development.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005