1
- no longer produced or used; out of date废弃的; 过时的：
the disposal of old and obsolete machinery
对陈旧、废弃机器的处理
the phrase was obsolete after 1625.
1625年以后这个短语就废弃不用了。
2
- Biology (of a part or characteristic of an organism) less developed than formerly or in a related species; rudimentary; vestigial【生】（生物特征的一部分）废退的, 退化的。
with obj.
- chiefly US cause (a product or idea) to be or become obsolete by replacing it with something new〈主美〉淘汰（产品）; 废弃（想法）：
we're trying to stimulate the business by obsoleting last year's designs.
我们正设法通过淘汰去年的设计来刺激生意。
派生词
obsoletely
adverbobsoleteness
nounobsoletism
noun词源
late 16th cent.: from Latin obsoletus 'grown old, worn out', past participle of obsolescere 'fall into disuse'.