What does the word nyan mean? Well, that's what this blog post is here for. You've most likely heard the word nyan before, since it's one of the more common Japanese words. There's Nyan Cat, the Hatsune Miku song Nyanyanyanyanyanyanya, and the word nyan is also used by Anime characters or Neko girls. Jibanyan and other cat Yokai (from Yokai Watch) also have the word nyan at the end of their names. Now, on to the definition. The word nyan is a Japanese onomatopoeia for the sound a cat makes, much like the English word meow. So, it makes perfect sense that it is associated with cats, for obvious reasons.