The Collaborative International Dictionary
established \established\ adj.
brought about or set up or accepted; especially long and widely accepted; as, distrust of established authority; a team established as a member of a major league; enjoyed his prestige as an established writer; an established precedent; the established Church. Contrasted with unestablished. [Narrower terms: entrenched; implanted, planted, rooted; official; recognized]
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securely established; as, an established reputation.
Syn: firm.
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settled securely and unconditionally.
Syn: accomplished, effected.
conforming with accepted standards.
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shown to be valid beyond a reasonable doubt; as, the established facts in the case.
Syn: proved.
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(Bot.) introduced from another region and persisting without cultivation; -- of plants.
Syn: naturalized.