Definition of obsolescence noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌɒbsəˈlesns//
; NAmE NAmE//ˌɑːbsəˈlesns//
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the state of becoming old-fashioned and no longer useful products with built-in/planned obsolescence (= designed not to last long so that people will have to buy new ones)
See the Oxford Advanced American Dictionary entry: obsolescence