Kachina is used in reference to three different aspects: Firstly, in western Pueblo religious beliefs, Kachina represents the concept of spirit being or the supernatural being. Western Pueblo refers to the Native American cultures that include Hopi, Tewa, Zuni, Laguna Pueblo, and Acoma Pueblo. 
Secondly, it refers to kachina dancers. Members of Native American community who impersonate the kachina by wearing masks and costumes at religious ceremonies are thus known as kachina dancers.
Thirdly, kachina also refers to small kachina dolls played by or gifted to children representing the original kachina. 
Kachina is also known as katchina, katcina, katsina. In its plural form, it is spelled as katsinim.