Understand 'tiffin' as a cultural term for day meals in India, less used in modern UK English. In Mumbai, people often enjoy tiffin delivered by dabbawalas.
Pro Tip 2/3
Not Dinner
'Tiffin' specifically refers to a lighter, daytime meal and not a heavy evening dinner. He invited me over for tiffin, not dinner, so I expected sandwiches or pastries.
Pro Tip 3/3
Time Bound
Use 'tiffin' for meals typically had around noon, distinguishing it from brunch or tea time. She asked if I was free for tiffin, implying a midday meal.