As mentioned above the names of Indian dishes mainly come from cooking process involved in preparing them or the the main ingredient in it or the region it comes from. So here's what some of the names you may come across on a menu mean:
Masala: This word typically means spice mix so recipes for Masala dishes can be as varied as the chefs that cook them! They can therefore range from medium to really hot but will usually have a thick, not very substantial gravy.
(Also read:
The Heart of Indian Cuisine-Spices!)
Karahi or Kadhai/Kadai: This style of cooking gets its name from the wok-like dish known as Karahi it is cooked in. In Karahi/ Kadhai dishes the main ingredient is usually marinated in a yogurt and spice sauce and then stir-fried in a Karahi with sliced onions, bell peppers, ginger, garlic and chopped tomatoes. Karahi dishes range from medium to very hot and have medium amounts of gravy. Spices to expect are coriander, cumin, chilli and garam masala.
Korma or Quorma:Korma is a creamy mild sauce, usually made with yogurt, cream and occasionally nuts and coconut milk. It is Mughlai dish from North India is typically made by marinating the main ingredient in yoghurt and spices like ginger and garlic. It is then cooked in its own juices and a gravy made of onions, lots of tomatoes, green chillies and whole spices like cinnamon, cardamom, cloves, coriander, cumin, etc. Kormas can range from mild to medium hot.
Bhuna, Bhoona or Fry: This means "to stir-fry or sauté". Many Indian dishes require spices to be lightly fried or Bhoono-ed to release their aroma and flavors and prevent them from having a 'raw' taste. Bhuna dishes can range from mild to hot. Bhuna dishes are characterized by the fact that the meat or vegetable used is cooked in its own liquids and no extra water is added. This makes for medium amounts of thick gravy that go well with both wet and dry dishes.
Saag: The word Saag is mostly used in connection with leafy greens like spinach, fenugreek, mustard greens and dill. In India, Saag is not just cooked by itself but often combined with great success with all kinds of meat, fish and vegetarian ingredients. The greens in these dishes may be chopped fine and cooked or cooked and creamed. Saag dishes are mostly mild with a medium amount of gravy. They're not the most aesthetically pleasing to look at with it's green color but it's healthy and most of the time you wouldn't believe their green leafy vegetables.
Achaari: Made with spices similar to those that go into Indian pickles, Achaari dishes can be medium- to very hot and most often will have a tangy flavor. Expect spices like chilli, fennel, mustard, carom seed (or Bishop's weed), cumin etc. These dishes will be on the drier side with minimal gravy so it's best to make you second main dish a gravy dish.
Makhani/Makhni: This name comes from the word Makkhan which means butter! These typically North Indian dishes are therefore cooked in butter and have substantial creamy gravy in which tomatoes play a predominant role. Makhni dishes are usually mild to medium hot and made with chicken, vegetables or lentils.
Butter Chicken also known as
Murgh Makhani is probably the most well known makhani dish of all times.
Malai: This word means cream. Malai dishes have a good amount of creamy, cream-based gravy. This gravy is mild and usually made with onions, tomatoes, ginger and garlic to which spices like coriander, cumin, garam masala etc are added. Cream is added to the dish as a finishing touch. Expect the dish to be mild and team it with a hotter, relatively drier main dish.
Kashmiri: This style of cooking comes from Kashmir in North India and is characterized by rich, creamy gravies made up of spices, nuts and dried fruit teamed with milk and cream! The result is delicious mild dishes that go well with rice preparations. Expect fragrant spices like cinnamon and cardamom. The gravy is often mildly sweet as sometimes sugar is added to the dish or the raisins and dry fruits tend to sweeten the dish.
Jalfrezi: This tasty style of cooking came about in the days of the British in India. 'Jal' means hot and 'frezi' means fry, so it essentially a stir-fry with little gravy. Usually a meat like chicken, lamb or beef, or vegetables is stir-fried with green chillies, bell peppers, onions and tomatoes and then cooked in its own juices.
Dopiaza/ Dopyaza: 
This term means two (do) onions (piaza) or double onions. This
Mughlai (Mughal style) dish is usually prepared with lots of onions - pureed onions that makes up a thick gravy to which the main ingredient is added and the other that is added raw and cooked with the main ingredient or stir-fried till caramelized. As onions contain high amounts of natural sugar they caramelize when they are fried and render a slight sweetness to the dish. Onions are also used as a garnish.
Mughlai: Mughlai cuisine is a result of the Mughal rule in India. Food was rich and cooked with aromatic spices, nuts and dried fruits. Most Indian restaurants interpret this as mild to medium-hot cream and nut based gravies, rice dishes with lots of nuts and dried fruits. Saffron is a key ingredient used to flavor these dishes along with whole
spices.
(Also Read:
Mughlai Cuisine- From the Kitchen of the Royal Emperors)
Vindaloo: Hot Vindaloo dishes have their home in coastal
Goa in western India. The Vindaloo spice mix is made by grinding lots of dry red chillies and whole spices like cinnamon, cloves and cumin in vinegar. Vindaloos have plenty of gravy and are usually made with pork but can also be cooked using beef, chicken fish or lamb. The result is a tangy and spicy dish that goes well with bread.
(Also Read:
Goan Cuisine: 10 Dishes that Scream GOA!)
Dum: This is a style of cooking that originated in the North. Dum means pressure and implies that the dish is cooked to a certain stage and then the vessel sealed to pressurize the contents and cause them to slow-cook (for hours sometimes) in their own juices. Dum dishes can range from mild to hot and usually have a medium amount of gravy. This method of cooking is used to prepare rice dishes as well.
Madras: Probably called Madras curries to identify them with their home in the south of India, these are really hot curry dishes. Madras curries team lots of pepper and chilli with onion, tomato, curry leaves and mustard and have a good amount of gravy which is why they go well with plain boiled rice.
Continued in A Guide to Ordering Indian Food: Indian Menu Terms & Dishes (Part-II)Also Read: A Guide to Ordering Indian Food:
What You Need to Know Before You Order