I. ˈmēn.ˌtīm noun
Etymology: Middle English mene-time, from mene occupying a middle position + time — more at mean
: the intervening time : interval
in the meantime had satisfied his omnivorous appetite for reading in the village library — A.C.Cole
II. adverb
: meanwhile
meantime he had been attentive to his other interests — H.R.Warfel