The phrase "a unitary definition" is correct and usable in written English.
It can be used when discussing a single, cohesive definition of a term or concept that encompasses all relevant aspects.
Example: "In our research, we aim to establish a unitary definition of sustainability that can be universally applied across different disciplines."
Alternatives: "a singular definition" or "a comprehensive definition".
Resilience to disasters has become an expansive domain which, according to Béné et al. (2012), has become extremely difficult to summarize under a unitary definition.
Indeed, medical professionalism is a complex concept that defies a unitary definition.
The UDDA may appear to support DCD but only if we construe a bifurcated rather than a unitary definition of death that does not require the permanent cessation of the organism as a whole but only of certain parts of it.
Avoiding any sharp, unitary definition, he variously associates romanticism with fascination with the sublime, Gothic motifs, transcendence and echantment.
It deals with unchangeable entities that have unitary definitions.
Second: I have always thought that it is difficult to extract from my books, each of which is so different from the others, a unitary discourse, an overall definition, maybe even just the outline of an author that is not also split up.
This typological approach contrasts with the traditional definition, which is more orientated towards offering an unitary (albeit three-dimensional) definition of the syndrome, with more or less consistent aetiology and symptoms [ 5, 6].
Representation theory starts with two definitions: a unitary representation of G is a continuous homomorphism, say T, from G to the group (mathcal{U}(mathcal{H})) of linear isometries of a Hilbert space; we write ((mathcal{H}, T)) for it.
In contrast, we could not confirm a unitary construct underlying the DSM-IV or DSM-5 definitions of PTSD.
This definition has evolved from the concept of a unitary short-term memory system [ 7].
In contrast, we found no evidence for a unitary construct underlying either the DSM-IV or DSM-5 definitions of PTSD or ICD-11 C-PTSD.
