The phrase "an overarching question" is correct and usable in written English.
It can be used when referring to a central or fundamental question that encompasses a broader topic or theme.
Example: "In our discussion about climate change, the overarching question remains: how can we effectively reduce carbon emissions globally?"
Alternatives: "a fundamental question" or "a central question".
The Supreme Court returns Monday to an overarching question: Are the federal courts the right forum for resolving societal problems?
There are many sides to the refugee debate in Australia, but an overarching question is this: how can we create a more sustainable and humane policy that accords with international law?
There is an overarching question of whether mankind's curiosity can go too far, a notion that sounds as if it's straight out of a debate on cloning or gene therapy.
When reflecting on these case studies, I couldn't help but come back to an overarching question: where does one draw the line between one's efforts towards social justice and one's allegiance to his or her narrators?
Each development in this process further clarified the end goal, leading me to an overarching question for my thesis: Is forming and supporting a local, team-based structure to design and execute an infection control protocol from within the neurosurgery ward an effective way to reduce infection and improve compliance to good infection control practices?
The dimensions of the health system framework are detailed in Table 3, with an overarching question and key elements of systems capacity spelt out.
What unites them, though, is a single, overarching question: if the jihadists are just a bunch of bloodthirsty, head-chopping, woman-haters, why does the West have such a hard time gaining the moral high ground in what America persists in calling the "war on terror?"Bruce Bawer and Claire Berlinski focus on what they see as a moral and spiritual crisis for Europe.
A more overarching question is this: Why should The Times, and newspapers in general, continue to do political endorsements at all? Isn't this an antiquated practice that — in its clear expression of preference — causes even more mistrust among a public that often feels its newspaper is biased?
A similar overarching question is whether the current rating systems address key environmental health concerns.
Workshop participants agreed on a key overarching question: Is there sufficient understanding of the mechanisms of asbestos toxicity to determine the relevance of mineralogy and dimension in asbestos-induced disease?
In the post-genomic era, a central and overarching question in the analysis of protein-protein interaction networks continues to be whether biological characteristics and functions of proteins such as lethality, physiological malfunctions and malignancy are intimately linked to the topological role proteins play in the network as a mathematical structure.
