Denshi Jisho — Online Japanese dictionary

立つ たつ 1: to stand; to rise; to stand up;
2: to find oneself (e.g. in a difficult position);
3: to depart (on a plane, train, etc.)
Common word, Godan verb with tu ending, Intransitive verb 
立つ瀬 たつせ predicament; one's ground; one's position
Noun 
立つ鳥 たつとり bird taking flight
Noun 
立つ瀬がない たつせがない having lost face; in a bind
Expression 
立つ鳥跡を濁さず たつとりあとをにごさず it is simply common courtesy to clean up after yourself; a bird does not foul the nest it is about to leave; on leaving a place one should see that all is in good order
Expression 

You can also

Look up kanji details for 立つ.

Try a Yahoo Jisho search for 立つ .
Try a Goo Jisho search for 立つ .
Try a Google search for 立つ .