Definition of "established"

simple past and past participle of establish  examples

Having been in existence for a long time and therefore recognized and generally accepted.  examples

Of a religion, church etc.: formally recognized by a state as being official within that area.  quotations  examples

Of any social or economic entity: part of the establishment (“groups with socioeconomic power”).  examples

(Model, procedure, disease) Explicitly defined, described or recognized as a reference.  examples