Dic: meanwhile (a usage of logical contrast rather than temporal synchronicity)

■ You use meanwhile to introduce a different aspect of a particular situation, especially one that is completely opposite to the one previously mentioned. ex) He had always found his wife's mother a bit annoying. The mother-daughter relationship, meanwhile, was close.

■ used to compare two aspects of a situation: ex) Stress can be extremely damaging to your health. Exercise, meanwhile, can reduce its effects.

■ used to compare two things, especially if they are completely different and are happening at the same time: ex) The incomes of male professionals went up by almost 80%. Meanwhile, part-time women workers saw their earnings fall.

■ used for emphasizing the difference between two situations: ex) You throw food away, and meanwhile children are starving all over the world.

.... COBUILD, OALD, LDOCE, MacMillian