"Adult cats, living apart from humans, have very clear communication with one another. It is spoken mostly through scent, then through facial expression, complex body language, and touch.
Vocal communication involves caterwauls for mating, chattering upon spotting prey, hissing to ward off an intruder, or shrieking when hurt or terrified. Meowing is not part of this language. Meow-ese, it would seem, is a language developed exclusively for humans.
The only meowing in the cat world is done between mom cat and her young kittens. A kitten’s tiny “mew” is a cute, endearing sound, used to solicit attention and care from mom cat."
It's just part of their plan to enslave the human race.
The rest of the article at petcentric.com