Meaning of INTEGRAL in English

INTEGRAL

[adjective] - necessary and important as a part of, or contained within, a wholeHe's an integral part of the team and we can't do without him.Bars and terrace cafés are integral to the social life of the city.(specialized) One of the biggest problems is that the prison has no integral sanitation.

Cambridge English vocab.      Кембриджский английский словарь.