The pair of lines from T.S. Elliot's "Rhapsody on a Windy Night" which is an example of onomatopoeia is "The street lamp sputtered, The street lamp muttered". Onomatopoeia is the formation of words which imitate sounds produced by people, animals or even objects. It's a figure of speech (some call it a figure of sound). "Sputter" and "mutter" are two perfect examples of onomatopoeia, since they are the representation of sounds and sound like those sounds. Other examples of onomatopoeia are: "buzz", "hiss" and "bang".