1. A region in space in which lines of force produced by an electric charge exert a force on other electric charges.
2. A region in space in which a stationary electric charge experiences a force due to its charge.
3. The area around an electrically charged body in which other charged bodies are acted on by an attracting or repelling force.
4. The lines of force exerted on charged ions in the bodily tissues by the electrodes that cause charged particles to move from one pole to another pole.
5. One of the fundamental fields in nature, causing a charged body to be attracted to or repelled by other charged bodies.

Associated with an electromagnetic wave or a changing magnetic field.

The electric field is stronger where the field lines are close together than where they are farther apart.

The value of the electric field has dimensions of force per unit charge and is measured in units of newtons per coulomb.

The atmosphere's electric field strength in volts per meter at any specified point in time and space near the Earth's surface and in fair-weather areas: A typical datum is about 100 and the field is directed vertically in such a way as to drive positive charges downward.

An atmospheric electric field is a quantitative term indicating the electric field strength of the atmosphere at any specified point in space and time.
An atmospheric electric field is also a measure, in volts per meter, of the electrical energy in a given portion of the Earth's atmosphere at a given time.

1. The effect on spectrum lines of an electric field which is either externally applied or is an internal field caused by the presence of neighboring ions or atoms in a gas, liquid, or solid.
2. The effect of an electric field on spectrum lines.

The electric field may be externally applied; but in many cases it is an internal field caused by the presence of neighboring ions or atoms in a gas, liquid, or solid.

The magnitude of an electric field at a point in the field that is equal to the force that would be exerted on a small unit charge placed at that point.

The electric field is the set of all values of the electric field strength, but electric field and electric field intensity (as well as electric field strength and electric vector) are used more or less interchangeably.

The trend is to use an electric field both for the field taken as a whole and for its value at any point with a context being sufficient to determine the precise meaning.

1. A vector which represents the force per unit charge acting on a positive charge in an electric field.
2. The force on a stationary positive electrical charge per unit charge at a point in an electric field.

It is usually measured in volts per meter.