1) Chinese mythology 2) Conception of God 3) Masculine given name 4) Taoist cosmology 
Tian is one of the oldest Chinese terms for the cosmos and its source, and a key concept in Chinese mythology, philosophy, and religion. During the Shang Dynasty (17–11th centuries BCE), the Chinese called their supreme god Shangdi (上帝, `Lord on High`) or Di (`Lord`); during the Zhou Dynasty, Tian became synonymous with this figure. Heav...
heaven.
an earthenware gratin dish; also vegetable gratins baked in such a dish; from Provence.
A tian is a large, oval-sjhaped earthenware cooking-pot traditionally used in Provence. The name is also applied to a dish comprising finely chopped vegetables cooked in olive oil and then baked au gratin (sprinkled with breadcrumbs and grated cheese and browned).
earthenware gratin dish; also vegetable mixture cooked in dish
Tian is a Chinese name for boys and girls. The meaning is `sky, heaven` The name Tian is most commonly given to Norwegian boys. (45 times more often than to American boys.) In France and Norge it is (almost) solely given to boys