An onomatopoeia is a work that imitates a sound, like "bark," "tick-tock," "meow," "moo," "oink," "roar," "ribbit," "vroom," etc.
But onomatopoeia is not the same in every language. For example, in Japanese "roof" (a dog's bark), is "wan-wan" - "Meow" is "Nya-nya."