es·tab·lish vt
1: to institute (as a law) permanently by enactment or agreement
we the people of the United States...do ordain and establish this Constitution — U.S. Constitution preamble
2: to make firm or stable
3: to bring into existence: found
Congress shall have power...to establish post offices and post roads — U.S. Constitution art. I; specif: to found (a national bank) pursuant to a charter
5: to put beyond doubt: prove
6: to place in a position of being accepted or followed
a rule establish ed by case law
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.