"meantime" in the noun sense
1. interim, meantime, meanwhile, lag
the time between one event, process, or period and another
"meanwhile the socialists are running the government"
"meantime" in the adverb sense
1. meanwhile, meantime, in the meantime
during the intervening time
"meanwhile I will not think about the problem"
"meantime he was attentive to his other interests"
"in the meantime the police were notified"
Source: WordNet® (An amazing lexical database of English)
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