The definition of a jayvee is a person playing on a junior varsity sports team.(noun)
An example of a jayvee is a freshman who just started playing high school football on the junior varsity team.
See jayvee in Webster's New World College Dictionary
Origin: < j(unior) v(arsity)
See jayvee in American Heritage Dictionary 4
Origin: Pronunciation of the initial letters in j(unior) v(arsity).