The phrase "a functional definition of" is correct and usable in written English.
It can be used when you want to specify a definition that is practical and applicable in a particular context or situation.
Example: "In our research, we established a functional definition of sustainability that focuses on measurable outcomes."
Alternatives: "a practical definition of" or "an operational definition of".
"That's a functional definition of a cure".
Zavala-Araiza, D. et al. Toward a functional definition of methane super-emitters: application to natural gas production sites.
This paper will discuss the issues and application of a functional definition of the NOAEL in toxicology evaluations.
Applying this approach to complex organizations necessitates mapping a functional definition of different organizational components within each step of the adaptive loop.
Indeed, a functional definition of mental retardation provides a compelling role for technology to mitigate the adverse impact of a person's cognitive impairments on school, work, and community functioning.
The dramatic technique of Baroque opera followed set rules: arias were to be sung at the front of the stage, facing the audience; the chorus was directed as a static body; and the ornate setting was an elaborate decoration with which to please the eye rather than a functional definition of the acting area.
As one would expect from such a functional definition, small values of γ correspond to larger assembly sizes and vice versa.
While not a functional definition, the absence of large lipid droplets in alveolar epithelial cells provides evidence that this secretory activation has occurred.
"I don't feel I'm particularly qualified to judge exactly what a precise functional definition of genocide is, but it seemed a no-brainer that killing a million people because they were Armenians fit the definition".
The possibility of madmen pushes us away from a simple functional definition of pain.
It was the use of violence to further political goals, which is a pretty functional definition of the term.
