The system defines four levels of threats represented by five colors: white, yellow, orange, red, scarlet.

This system defines the contribution, without constraining or promising a certain benefit.

Most legal systems define a specific ages for when an individual is allowed or obliged to do particular activities.

Most Islamic legal systems define this type of modest dressing as covering everything except the face and hands in public.

This system defined the movement to consist of these 'official' entities:

Some systems define taxable income within the system.

Defines a system for managing encryption data at rest security objects which includes:

Our social systems are what shape us and define us.

A system of three electromagnets placed perpendicular to each other can define a spatial reference.

Some operating systems define an execute permission which can be granted to users/groups for a script file.