The definition of an avatar is something visual used to represent non-visual concepts or ideas, or is an image that is used to represent a person in the virtual world of the Internet and computers.(noun)
An example of an avatar is an icon you use to represent you on an Internet forum.
See avatar in Webster's New World College Dictionary
Origin: Sans avatāra < ava-, down + base of tarati, (he) crosses over: see term
See avatar in American Heritage Dictionary 4
Origin: Sanskrit avatāraḥ, descent (of a deity from heaven), avatar
Origin: : ava, down
Origin: + tarati, he crosses; see terə-2 in Indo-European roots.
Learn more about avatar