su·per·sede /ˌsü-pər-'sēd/ vt -sed·ed, -sed·ing
1: to subject to postponement or suspension; esp: to suspend the operation of (a judgment or order) by means of a supersedeas
2: to take the place of in authority: preempt override
3: to take the place of and render null or ineffective
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.