Origin: Latin suffix -al
External has 8 different meanings across 2 categories:
The exterior; outward features or appearances.
"The judge ruled that we could not base our verdict solely on his external appearance, as he might be hiding a serious injury."
In plain English: An external thing is something that exists outside of you or the group you are part of.
"The doctor examined his external injury before applying a bandage."
Usage: Use "external" primarily as an adjective to describe something outside or on the surface, rather than as a standalone noun. If you need a noun form referring to outward appearance, use words like "exterior" or "appearance" instead.
happening or arising or located outside or beyond some limits or especially surface
"the external auditory canal"
"external pressures"
coming from the outside
"extraneous light in the camera spoiled the photograph"
"relying upon an extraneous income"
"disdaining outside pressure groups"
from or between other countries
"external commerce"
"international trade"
"developing nations need outside help"
Outside of something; on the exterior.
"Please apply that cream to the external skin rather than massaging it into your pores."
Situated near or toward the surface of the body.
"The doctor warned that applying strong ointments directly to an external wound could irritate the surrounding skin."
In plain English: External means something that is on the outside of a person or thing rather than inside.
"The external walls of the house need to be painted soon."
Usage: Use external to describe something located on the outside surface or belonging to an outer part of a system, distinct from what is internal. Avoid confusing it with words like interior when referring to the inside of an object or organization.
The word entered English in the late Middle Ages from Medieval Latin externus, which originally meant "outward" or "external." It traces back to an even earlier form meaning simply "on the outside."