1. until something expected happens, while something else is happening
Professional
Social
in the meantime, we'll have to carry on as before
If you say something is happening 'meanwhile' or 'in the meantime' it refers to 'the time in between' something happening and another event. This is a popular phrase and is used often in both social and professional contexts to talk about concurrent events or things happening at the same time as something else or between two other events.