langsat /ˈlɑŋ.sɑt/ noun2 •A small, whitish-brown fruit of Southeast Asia, from the tree Lansium domesticum, with fleshy pulp and subacid taste.He always had a good time, and always would come home with a bunch of bananas or a basket of langsat and durian fruit, which would definitely make Mamek happy, as well as his mother and father. — 2015 •The tree Lansium domesticum. formslangsats