verb (used without object), ob·so·lesced, ob·so·lesc·ing.

  1. to be or become obsolescent.


  1. (intr) to become obsolete

v.1801, from Latin obsolescere “to grow old, wear out, lose value, become obsolete,” inchoative of obsolere “fall into disuse” (see obsolete). Related: Obsolesced; obsolescing.

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