What is the definition for onomatopoeia?

A word that imitates or suggests the source of the sound that it describes. Onomatopoeia (as an uncountable noun) refers to the property of such words. Common occurrences of onomatopoeias include>>

buzz
bang
crackle
splash
sputter
boom
meow
quack
chirp
oink
roar

Onomatopoeia is a noun, it is a representation of a sound by an imitation..for example, the cat "mews"...it can also represent harsh and unpleasant sounds..It is also define as the formation or use of words such as buzz or murmur that imitate the sounds associated with the objects or actions they refer to.