Mission (glossary)
The mission of a system is the top-level function of the system; the one that synthesizes all transformation of all inputs and solicitations into outputs and reactions. (Created for SEBoK)
Source
This definition was developed for the SEBoK.
Discussion
For a full discussion of the role and importance of a clear understanding of mission needs in systems engineering see the Business or Mission Analysis article.
SEBoK v. 1.9.1 released 5 October 2018