"outstanding reason" is a correct and usable phrase in written English.
You can use it to describe a very important or persuasive reason for something. For example: "John's outstanding reason for wanting to move to California was to be closer to his family."
But, as Prudhomme sees it, there is one outstanding reason for a second visit in seven years after a century in which the Tour was all but ignored in Britain.
There is, however, at least one outstanding reason to visit the "Migration" show at the Whitney, and that is to see it in the context of another of the museum's current exhibitions: the Kara Walker retrospective.
Technical attributes have become mere entry-level requirements they're not the outstanding reason why consumers choose to buy a product.
There are outstanding reasons why Britain's universities should do so.
For all of those outstanding reasons the Obama White House is still categorically unwilling to say the line has been crossed.
With the problem that software engineering training can't meet the needs of the community, this paper analysis some outstanding reasons in software engineering curriculum teaching, such as old teaching contents, weak in practice and low quality of teachers etc.
Twitter says that with the above measures in place, there aren't any longer any outstanding reasons to legally block use of the service in Turkey, and it expects the government to restore it entirely before things proceed.
Troubled times or not, there are still some outstanding reasons to take the route of the traditional book publishing.
There are at least two outstanding reasons for integrating CAM into cancer care.
Three outstanding reasons are the wish to have a comprehensive reference work, an introduction to a new subject or the analysis or metanalysis of an overcrowded literature.
Together, generation time, gene flow and a lack of genetic variation constitute a triumvirate of outstanding reasons why climate-change scientists have felt safe in ignoring evolution even as they make sweeping claims about the impending consequences of changing climate on biodiversity [ 8].
