The definition of a theorem is an idea that can be proven or shown as true.(noun)
An example of a theorem is the idea that mixing yellow and red make orange.
See theorem in Webster's New World College Dictionary
Origin: < Fr or L: Fr théorème < L theorema < Gr theōrēma < theōrein, to look at, view < theoros, spectator: for IE base see theater
See theorem in American Heritage Dictionary 4
Origin: Late Latin theōrēma
Origin: , from Greek
Origin: , from theōrein, to look at
Origin: , from theōros, spectator; see theory.
Learn more about theorem