Onomatopeoeia and my cat . . .

What is an onomatopoeia? you should ask me how to spell it, I would miss badly. Let me see - Description of a sound is my first guess. Let me look it up . . . "formation of a word by imitation of a sound." Hah, I was verrrry close.
I'm not going to try to create one. Favorite sound? What is that? How can you have a favorite sound. Weird.