or pre-es·tab·lish.

Is pre established hyphenated?

It has a hyphen. The words "pre-establish" and "pre-establishment" are also in the OED. A word that is constructed by putting a standard prefix on another word will not get into every dictionary because the meaning will be obvious.

What is the meaning of pre established?

pre-establish in British English

(ˌpriːɪsˈtæblɪʃ) verb (transitive) to establish, set up, set out, arrange or make secure in advance or previously. They pre-established the rules for the game.