This is the 8964th most frequent Catalan word.
externa
"Externa" means "external" in English.
Here, 'externa' is used as an adjective to describe 'situació', meaning external or outside in relation to an internal context.
La situació externa afecta les decisions internes.
The external situation affects the internal decisions.
The word 'externa' functions as an adjective describing 'professora', indicating that the teacher comes from outside the organization or institution.
Aquest curs té una professora externa.
This course has an external teacher.
In this sentence, 'externa' is used to describe 'empresa', signifying that the company is external, not part of the existing structure or organization.