Webster's English Dictionary

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supersede

Cross references:
  1. replace               
 
su.per.sede \.su:-p*r-'se-d\ vt [MF superseder to refrain from, fr. L 
   supersede-re to be superio]r to, refrain from, fr. super- + sede-re to sit 
   - more at SIT 1a: to cause to be set aside  1b: to force out of use as 
   inferior  2: to take the place, room, or position of : REPLACE  3: to 
   displace in favor of another : SUPPLANT  - su.per.sed.er n