estar

1. to be (indicates location in space)
2. to be (denotes a transient quality; a quality expected to change)
3. (auxiliary with a and a verb in the infinitive (Portugal) or with the gerund (Brazil)) to be (forms the progressive aspect)
4. to cost (to be worth a certain amount of money), especially of something whose price changes often
5. to look (to give an appearance of being)
6. to stand