Alright is somewhat controversial. Some people insist it is not proper English. In school, I was taught it is not proper English. However; it is used as is explained here: http://www.merriam-webster.com/dictionary/alright All right, alright, and okay are synonyms in most use cases. The one exception I can think of is that "All right" can also mean "All correct," and neither okay, nor alright would be used in that sense.