what does the word dim sum mean?

I don't know.. What's it mean?

Definition: [DIHM SUHM] Cantonese for "heart's delight," dim sum includes a variety of small, mouth-watering dishes such as steamed or fried dumplings, shrimp balls, steamed buns and Chinese pastries. Dim sum--standard fare in tea houses--can be enjoyed any time of the day. Unlike most dining establishments, servers in a dim sum eatery do not take orders, per se. Instead, they walk among the tables with carts or trays of kitchen-fresh food. Diners simply point to the item they want, which is served on small plates or in baskets. Each item usually has a set price. At the end of the meal, the check is tallied by counting the dishes on the table. Some dim sum restaurants add the price of each dish to a check that remains on the table, clearing dishes as they are emptied. Resource link : http://web.foodnetwork.com/food/web/encyclopedia/termdetail/0,7770,2127,00.html