External (adjective)

1. Situated on or forming the outer surface or outer part of something.
2. Relating to the affairs or relationships of a country with other countries.
3. Not belonging to or coming from within a particular group, organization, or system.
4. Derived from external sources or factors rather than being inherent or internal.

Origin:

Late middle english: from latin externus, from exter "outer", comparative of ex "out of".

Examples:

1. The building has an external wall made of brick.
2. External trade is a major contributor to the country's economy.
3. The company is facing external pressure from competitors and changing market conditions.
4. The external appearance of the car was sleek and modern.
5. External factors such as the weather can affect crop yields.