Hi Candy, Meantime is a noun which is used to mean 'an intervening period of time'. Meanwhile can refer to an intervening period of time too, but it can also mean 'at the same time, while something else takes place'. For example; "On Friday I am going to Hong Kong but IN THE MEANTIME, (the time between now and Friday), I will continue going to school" "On Friday I am going to Hong Kong but MEANWHILE I will continue going to school" As stated above, meanwhile can also mean 'at the same time' For example; "I go to school, meanwhile the staff in Hong Kong play golf and drink beer" I hope this helps you.
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