Obsolescence

from WordNet (r) 3.0 (2006)
obsolescence
    n 1: the process of becoming obsolete; falling into disuse or
         becoming out of date; "a policy of planned obsolescence"
    
from The Collaborative International Dictionary of English v.0.48
Obsolescence \Ob`so*les"cence\, n. [See {Obsolescent}.]
   The state of becoming obsolete.
   [1913 Webster]
    

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