Pronunciation: (sOO"pur-sēd'), [key]
—v.t., -sed•ed, -sed•ing.
1. to replace in power, authority, effectiveness, acceptance, use, etc., as by another person or thing.
2. to set aside or cause to be set aside as void, useless, or obsolete, usually in favor of something mentioned; make obsolete: They superseded the old statute with a new one.
3. to succeed to the position, function, office, etc., of; supplant.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.