External meaning : (chiefly in the plural) The exterior; outward features or appearances. In the C programming language, a variable that is defined in the source code but whose value comes from some external source. Outside of something; on the exterior. Not intrinsic nor essential; accidental; accompanying; superficial. Foreign; relating to or connected with foreign nations. Away from the mesial plane of the body; lateral. Provided by something or someone outside of the entity (object, group, company etc.) considered.