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English definition of “vapourware”

vapourware

noun [U] humorous (US vaporware)     /ˈveɪ.pə.weər/ US  /-pɚ.wer/
a computer program that is advertised but is not yet or is never made availableComputer programming and software
(Definition of vapourware noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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