The phrase "a singular determination" is correct and usable in written English.
It can be used to emphasize a unique or specific decision or resolve in a particular context.
Example: "Her singular determination to succeed in her career inspired everyone around her."
Alternatives: "a unique resolve" or "a distinct decision".
Hospitalised in Cairo he demonstrated a singular determination that marked out his later life, mastering crutches within nine days and drawing caricatures for fellow patients.
There were no tantrums, no dramas but those in front of the camera; he spent a lot of time in quiet conference with his leading man, and kept up a momentum through a singular determination to have everything just as he wanted it.
Her research has found that the most successful people are those not only with self-discipline but also with a singular determination to accomplish a task, no matter the obstacles.
Serenely displayed in Room 95 at the museum are some 1,700 objects from the collection of Sir Percival David, a 20th-century businessman who amassed the ceramics with a cultivated eye and singular determination.
Loath though we may be to admit it, few of us possess the ice-lined stomachs to act with such singular determination and rationality during a market panic.
Yet these were mere subplots in the larger drama of Michael Jordan, a drama that has as much to do with his singular determination as his supernal talent, and never loses its appeal even though we have seen it before.
What's unprecedented is the singular determination of the Republicans both on Capitol Hill and in the statehouses to deprive President Obama of his major domestic achievement.
That singular determination also allowed Mr. Vanska, from 1996 to 2002, to transform the BBC Scottish Symphony from a technically flawed regional band into what many now consider one of Britain's finest orchestras.
Rather, it has to do with his (and his boss') singular determination to hand the keys to the Middle East to the Ayatollah and "disengage" from the ties that have "tied down" the U.S. in the region -- U.S. interests be damned.
("You gotta try it on the Apple Watch," Chazelle jokes). In part, that's because "First Man" is just as interested in the everyday life of Armstrong and his family as it is in his singular determination to make it to the moon.
Yet, when discussing "postnational" legitimacy, Habermas clearly makes self-determination by a singular demos the fundamental normative core of the democratic ideal.
