Definitions of outstanding:

• adjective:   owed as a debt

  Example: "Outstanding bills"

• adjective:   distinguished from others in excellence

  Example: "Did outstanding work in human relations"

• adjective:   having a quality that thrusts itself into attention

  Example: "An outstanding fact of our time is that nations poisoned by anti semitism proved less fortunate in regard to their own freedom"

• adjective:   of major significance or importance

  Example: "Einstein was one of the outstanding figures of the 20th century"