2,000 Calories a day is used for general nutrition advice, but calorie needs vary. Dunkin' Donuts has made a reasonable effort to provide nutritional and ingredient information based upon standard product formulations and following the FDA guidelines using formulation and nutrition labeling software.
Definition of system for English Language Learners. : 1  a group of related parts that move or work together. : 2  a body of a person or animal thought of as an entire group of parts that work together. : 3  a group of organs that work together to perform an important function of the body.
Freebase(3.00 / 1 vote)Rate this definition: Physical system. In physics, the word system has a technical meaning, namely, it is the portion of the physical universe chosen for analysis. Everything outside the system is known as the environment, which in analysis is ignored except for its effects on the system.