In Islamic tradition, "Hoor" (حور) refers to beautiful female companions in Paradise. It is derived from the Arabic word "hur" (حور), which means "black-eyed" or "white-skinned." In this context, it's a specific term with religious significance.
In other contexts, "Hoor" might be a variation of a name or a word from another language.
For a more accurate answer, please provide more context. What language are you interested in? What is the situation in which you encountered the word "Hoor"?