The Collaborative International Dictionary
Supersede \Su`per*sede"\, v. t. [imp. & p. p. Superseded; p. pr. & vb. n. Superseding.] [L. supersedere, supersessum, to sit above, be superior to, forbear, omit; super above + sedere to sit: cf. F. supers['e]der. See Sit, and cf. Surcease.]
To come, or be placed, in the room of; to replace.
To displace, or set aside, and put another in place of; as, to supersede an officer.
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To make void, inefficacious, or useless, by superior power, or by coming in the place of; to set aside; to render unnecessary; to suspend; to stay.
Nothing is supposed that can supersede the known laws of natural motion.
--Bentley. (Old Law) To omit; to forbear.
Wiktionary
vb. (present participle of supersede English)
Usage examples of "superseding".
My reason for so doing is that I have approved an act of the same title passed by Congress after the passage of the one first mentioned for the express purpose of correcting errors in and superseding the same, as I am informed.
Still, we had done our best to free him from these undue burdens by precise, up-to-date, and superseding advice, which he rejected.
And if, as is generally agreed, the Homeric poems represent the work of several bards covering a considerable period of time, there is nothing out of the way in the supposition that, while the earlier writers represented bronze as the material for weapons, because it was actually so in their time, the later ones, writing at a period when iron was largely superseding, but had not altogether superseded, the older metal, should, while clinging in general to the old poetic word used by their predecessors, occasionally introduce the name of the metal which was becoming prevalent in their day.
Agnes Sorel, superseding his early allies Richmond and Charles of Anjou.
The obvious solution would be a new agreement superseding the Articles of Confederation and creating a more powerful central government: in a word, a constitution.