Meantime
Part of speech: noun
Definition: The time spent waiting for another event; time in between.
Part of speech: adverb
Definition: during the interval; meanwhile
Example sentence: The next thing I am doing is moving back home to Minnesota and getting involved in politics. I'm looking at a run for Senate in 2008, but in the meantime I am focused on knitting together the progressive network in the upper Midwest.
Meanwhile
Part of speech: adverb
Definition: During the time (that something is happening).At the same time, but elsewhere.
Part of speech: noun
Definition: The time between two events
Example sentence: As far as self-confidence goes, so much of social media is about approval, getting likes, comparing our lives to others' - meanwhile, confidence is an inside job: it's about how you feel about yourself regardless of what anyone else does or thinks. It's a knowing that you're human, you're flawed, and you're awesome in your own way.