The definition of a plethora is an overabundance or excess.
(noun)An example of plethora is an excess amount of food for a barbecue.
See plethora in Webster's New World College Dictionary
noun
Origin: ML < Gr plēthōrē < plēthein, to be full
See plethora in American Heritage Dictionary 4
noun
Origin:
Origin: Late Latin plēthōra
Origin: , from Greek
Origin: , from plēthein, to be full; see pelə-1 in Indo-European roots
.Learn more about plethora