This is the 7976th most frequent Russian word.
комплексное
"Comprehensive" or "complex."
Here, 'комплексный' is used to mean 'set' with regard to a meal that includes multiple courses or components.
Я заказал комплексный обед в ресторане.
I ordered a set meal at the restaurant.
Here, 'комплексный' is used to mean 'comprehensive' in relation to a method that includes dealing with all aspects of the issue.
Для решения проблемы нужен комплексный подход.
A comprehensive approach is needed to solve the problem.
In this context, 'комплексный' implies 'integrated' services that are combined into a complete package.