the following is taken from the vegetarian society website.
Only vegans exclude milk and cheese
A vegetarian is someone living on a diet of grains, pulses, nuts, seeds, vegetables and fruits with or without the use of dairy products and eggs.
A vegetarian does not eat any meat, poultry, game, fish, shellfish or crustacea, or slaughter by-products.
Types of Vegetarian
Lacto-ovo-vegetarian. Eats both dairy products and eggs. This is the most common type of vegetarian diet.
Lacto-vegetarian. Eats dairy products but not eggs.
Vegan. Does not eat dairy products, eggs, or any other animal product.