A grocery store is closely associated with shopping for food. If you had been dreaming of a grocery store, it can mean you need food in your waking life. If you had no money to make purchases for grocery, then your dream was meant to serve you a reminder to do something to get money, to buy groceries.
Dreaming of a grocery store can mean getting items which you need. In a dream, items which are non-food, may also appear in your dream’s grocery store.