/ ˈɒbsəliːt; NAmE ˌɑːbsəˈliːt/ adjective
no longer used because sth new has been invented
SYN out of date :
obsolete technology
With technological changes many traditional skills have become obsolete.
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WORD ORIGIN
late 16th cent.: from Latin obsoletus grown old, worn out, past participle of obsolescere fall into disuse.