形容詞 obsolete:

1. old; no longer in use or valid or fashionable
   同義詞：outdated, out-of-date, superannuated
2. no longer in use
   同義詞：disused

1. The typewriter is obsolete.
   這架打字機(jī)老掉牙了。
2. Our service is obsolete, requiring root and branch reform.
   我們的服務(wù)已經(jīng)過(guò)時(shí)，需要從根本上進(jìn)行改革。
3. The army plans to phase out the equipment as it becomes obsolete.
   軍隊(duì)計(jì)劃淘汰這些設(shè)備，因?yàn)樗鼈円呀?jīng)報(bào)廢了。
4. An obsolete locomotive.
   一個(gè)過(guò)時(shí)的火車(chē)機(jī)車(chē)

ob.so.lete

adj.（形容詞）
Abbr. obs.No longer in use:
縮寫(xiě) obs.廢棄的：不再使用的：
例句：
an obsolete word.See Synonyms at old
一個(gè)廢棄的詞參見(jiàn) old

Outmoded in design, style, or construction:
過(guò)時(shí)的：在設(shè)計(jì)、樣式或構(gòu)造上已陳舊過(guò)時(shí)的：
例句：
an obsolete locomotive.
一個(gè)過(guò)時(shí)的火車(chē)機(jī)車(chē)

Biology Vestigial or imperfectly developed, especially in comparison with other individuals or related species; not clearly marked or seen; indistinct. Used of an organ or other part of an animal or a plant.
【生物學(xué)】 退化的，發(fā)育不完全的：器官退化或發(fā)育不全的，尤指其他相關(guān)個(gè)體或種屬；沒(méi)有被清楚地標(biāo)識(shí)或看見(jiàn)；不分明。用于動(dòng)物或植物的器官或其他部分
v.tr.（及物動(dòng)詞）
ob.so.let.ed,ob.so.let.ing,ob.so.letes
To cause to become obsolete.
使…陳舊的

來(lái)源：
Latin obsolôtus [past participle of] obsolôscere [to fall into disuse] * see obsolescent
拉丁語(yǔ) obsolôtus [] obsolôscere的過(guò)去分詞 [變得過(guò)時(shí)] *參見(jiàn) obsolescent

【引伸】
ob.solete.ly
adv.（副詞）
ob.solete.ness
n.（名詞）
ob.solet.ism
n.（名詞）