external
//ɪkˈstɜːnəl//
Adjective
1
Relating to or situated on the outside of something; outer.
The external walls of the building need to be repainted.
2
Coming from or relating to a source outside a particular organization, country, or system.
The company hired external consultants to review their business strategy.
3
Existing or occurring independently of the mind; objective.
Scientists study external reality through observation and experimentation.
4
For or concerning students registered with and taking the examinations of a university but not resident there.
She is an external student at the University of London.
Noun
1
The outward features or appearance of something.
Don't judge by externals alone.
2
An external student at a university.
She studied as an external while working full-time.