The phrase "a single expression" is correct and usable in written English.
It can be used when referring to one specific phrase or statement that conveys a complete idea or thought.
Example: "In mathematics, the equation can be simplified to a single expression that represents the solution."
Alternatives: "one expression" or "a solitary expression".
So, not a single expression of bitterness?
Why are their faces frozen in a single expression?
Then they allowed themselves a single expression of feeling: "This result leaves us with the deepest concern".
Not the ones he just decorated but the handful he designed from the ground up, in which he brought all his talents to bear in a single expression.
And there is what is known as "code-mixing," in which two languages — one of them invariably English — are conflated in a single expression.
If a single expression can convey fear, hope, determination and uncertainty all in one rapid spasm, then the inner turmoils of the political moment etched themselves briefly across the Democratic presidential candidate's normally studied features.
What makes this 7,000-square-foot 7,000-square-foot 7,000-square-footsuburban neighouse is its theme: the struggle for unity, pulling together the different parts ofromfamits and a culture into a sprawlingpresuburban
(Actually, the current occupant of the assistant D.A. role, Angie Harmon, is vastly more annoying than either Jill Hennessy or Carey Lowell was; her voice is like fingernails on a blackboard, and her face registers only a single expression).
Those split seconds where a single expression can convey everything that words simply can't, where a breath or a furrowed brow unequivocally says it all.
The review board's report on the causes of the crisis said that board members could not find a single expression of outrage in church correspondence from a supervising bishop about any priest that the bishops knew had been accused of abuse.
11 and 12 into a single expression.
