the fourth dimension
noun/ðə ˌfɔːθ daɪˈmenʃn/, /ðə ˌfɔːθ dɪˈmenʃn/
/ðə ˌfɔːrθ daɪˈmenʃn/, /ðə ˌfɔːrθ dɪˈmenʃn/
[singular]- (used by scientists and writers of science fiction) time
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the fourth dimension