It depends on where you grab your definition of "cliché" from. The Oxford English Dictionary includes the definitions of basically anything (Although particularly phrases, plots, and characterisation) that is stereotyped and/or overused.
It's not a dirty word. Calling something a cliché doesn't necessary mean something bad unless the user wants it to. Alien is clichéd all to hell, but it just does everything better than what came before it, so people don't care. Same with a lot of movies.