Definition of "Establish" :

verb: use as a basis for; found on

verb: establish the validity of something, as by an example, explanation or experiment

verb: institute, enact, or establish

verb: place

verb: set up or lay the groundwork for

"Establish a new department."

verb: bring about

"The trompe l'oeil-illusion establishes depth."

verb: build or establish something abstract

verb: set up or found