- a proposition that is not self-evident but that can be proved from accepted premises
- an expression of relations in an equation or formula
- a proposition embodying something to be proved

Origin of theorem

from French or L: French*théorème*from Classical Latin

*theorema*from Classical Greek

*the?r?ma*from

*the?rein,*to look at, view from

*theoros,*spectator: for Indo-European base see theater