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English definition of “space-time”

space-time

noun [U] uk   /ˌspeɪsˈtaɪm/ specialized us  
a part of Einstein's Theory of Relativity, which adds the idea of time to those of height, depth, and lengthParticular theories and concepts in physics
(Definition of space-time from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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