- 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"
- mean time, mean solar time - (astronomy) time based on the motion of the mean sun (an imaginary sun moving uniformly along the celestial equator)
--1 is a kind of time unit, unit of time