Outside the context of mathematics where it is the number of times a given function has to be differentiated to obtain a given derivative, it a qualitative statistical concept applicable to the law of entropy that refers to the regularity of arrangements or sequences of objects, numbers or events. In this respect, it is different from organization. When entropy is evident, it is order rather than organization that tends to decrease in irreversible processes. Stating that a system is highly ordered conveys nothing about its level of organization. Thus, order and organization are not synonymous.
See Chaos theory, Complex system, Entropy, Implicate order, Organization, Second law of thermodynamics