Meanwhile and While

Meanwhile adverb - At the same time but in another place.

While and meanwhile are semantically related in part of speech topic. In some cases you can use "While" instead the word "Meanwhile" as an adverb or a conjunction or a preposition, when it comes to topics like duration, during, at the same time, for now.

While conjunction - At or during the time that.

Meanwhile and while are semantically related in during topic. You can use "Meanwhile" instead the word "While" as an adverb or a conjunction or a preposition.