The Meanwhile project is an open implementation of the Lotus Sametime client protocol. The project provides a library written in C, a python module, and a Gaim plugin utilizing the library.
The intervening time; as, in the meantime (or mean time).
In the intervening time; during the interval.
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"
at the same time but in another place; "meanwhile, back at the ranch..."