a.[Z]

1. 废弃的，淘汰的
2. 过时的，老式的
3. 【生】退化的，不发育的

vt.

1. 废弃，淘汰
   Newer media are obsoleting the book.

   更新的传播媒介正在逐步淘汰书籍。

adj.

1. no longer produced or used; out of date.
2. Biology  less developed than formerly or in a related species; rudimentary; vestigial.

v.