Question

obsolete 【obsolete】adj.作废的；过时的Bowing to greet a lady is now an obsolete custom.现今，用鞠躬来欢迎女士已是过时的习俗。

Accepted Answer

[ˌɑːbsə'liːt] 
obsoleteno longer in use
Use the adjective obsolete for something that is out of date. As the Rolling Stones song "Out of Time" goes, "You're obsolete, my baby, my poor old-fashioned baby."
Obsolete is from the Latin obsolescere "to fall into disuse," and it is a very handy adjective for anything that is no longer used, from words to factories to computer software to ways of thinking. Something that is obsolete has usually been displaced by a newer, shinier innovation. Compact discs made records and cassettes obsolete, and then downloadable digital music files made compact discs obsolete.
All forms of 'obsolete' will appear on average once every 1313 pages.obsoleteobsoleteness

Front	obsolete
Pron	[ˌɑːbsə'liːt]
Back	【obsolete】adj.作废的；过时的 Bowing to greet a lady is now an obsolete custom. 现今，用鞠躬来欢迎女士已是过时的习俗。
Vocab	obsoleteno longer in use Use the adjective obsolete for something that is out of date. As the Rolling Stones song "Out of Time" goes, "You're obsolete, my baby, my poor old-fashioned baby." Obsolete is from the Latin obsolescere "to fall into disuse," and it is a very handy adjective for anything that is no longer used, from words to factories to computer software to ways of thinking. Something that is obsolete has usually been displaced by a newer, shinier innovation. Compact discs made records and cassettes obsolete, and then downloadable digital music files made compact discs obsolete. All forms of 'obsolete' will appear on average once every 1313 pages. obsolete obsoleteness

Obsolete Longer Adjective Compact Discs Made ˌɑːbsə'Liːt Obsolete】Adj.作废的；过时的