n (countable) A baked food item made from flour and fat pastes such as pie crust; also tarts, bear claws, napoleons, puff pastries, etc.
n (uncountable) The food group formed by the various kinds of pastries.
n (uncountable) The type of light flour-based dough used in pastries.
n (countable, obsolete) A place where pastry is made.
n (uncountable) The act or art of making pastry.
n (uncountable, culinary industry) Desserts of all kinds, whether or not these incorporate the baked item made from flour and fat, or that section of a kitchen that prepares these.