meantime · noun /ˈmiːn.tɑɪm/
in the meantime
B2 in the time between two things happening, or while something else is happening
Dictionary example:
Your computer won't be arriving till Thursday. In the meantime, you can use Jude's.
Learner example:
In the meantime, I decided to buy a new bicycle. (First Certificate in English; B2; German)