1. One of the basic properties of elementary particles that give rise to all electric and magnetic forces and interactions; these properties are given negative and positive algebraic signs and measured in coulombs.

An electron has a negative charge, and a proton has a positive charge.

2. The amount of electricity accumulated in a body by the gain or loss of electrons.
3. An accumulation of electricity in a storage battery, capacitor, etc., which may be discharged.
4. The quantity of electricity that flows in electric currents or which accumulates on the surfaces of dissimilar nonmetallic substances that are rubbed together briskly.

A charge can be positive or negative and one positive charge can combine with one negative charge, and the result is a net charge of zero.

Two objects that have an excess of the same type of charge repel each other, while two objects with an excess of opposite charges attract each other.