One who, or that which, externalizes.

plural of externalization

plural of externalism

The condition of being external; outwardness

(India) Exile; banishment, as a sentence for crime.

plural of externment

plural of network externality

(anatomy) The outer ear.

(medicine) A cause for an effect in a system that is not a constituent of that system, especially causes of personal health problems or death, such as poison, weapon wounds, or accident.

(Internet) A hyperlink that links to another website or domain.