1. monkey, mouse or rat vocalization 2. sound of a squeaky shoe (from “Mr. Brown can moo, can you?” by Dr. Seuss) 3. human exclamation uttered when scared or distressed
onomatopoeia: 1. the naming of a thing or action by a vocal imitation of the sound associated with it (as buzz, hiss) 2. the use of words whose sound suggests the sense