Meaning of “system” - Learner’s Dictionary

system

noun [ C ] us uk /ˈsɪstəm/
He pointed out several inadequacies in the present system.I think the old system was better in many ways.This is the biggest shake-up in the legal system for fifty years.Low test scores are a sad reflection on our school system.The present tax system penalizes poor people.
METHOD

B2 a way or method of doing things:

the American legal system
the public transport system
EQUIPMENT

B1 a set of connected pieces of equipment that operate together:

They've had an alarm system installed at their home.
BODY

parts of the body that work together in order to make something happen:

the body's immune system
the system

the laws and rules of a society

(Definition of “system” from the Cambridge Learner’s Dictionary © Cambridge University Press)