IPA: /ˈmiːnˌwaɪl/
KK: /ˈminˌwaɪl/
At the same time or during the time in between two events.
The meeting will start at 3 PM; meanwhile, you can prepare the presentation.
The time that occurs between two events or actions.
I will finish my homework; meanwhile, you can watch TV.
Meanwhile → It is formed from "mean" (from Old English *mēne*, meaning intermediate or middle) and "while" (from Old English *hwīl*, meaning a period of time). The word "meanwhile" refers to the time in the middle of two events or actions occurring.
Think of a time that is 'in the middle' ('mean') of two events, which helps you remember that 'meanwhile' refers to what happens during that time.