The phrase "adoption is defined" is correct and usable in written English.
You can use it when explaining the meaning or concept of adoption in a formal or academic context.
Example: "In legal terms, adoption is defined as the process by which a person becomes the legal parent of a child who is not biologically their own."
Alternatives: "the concept of adoption is described" or "adoption is characterized as".
For this review, which draws on and further develops concepts advanced in the literature (Pine et al. 2011; Ruiz-Mercado et al. 2011), IS adoption is defined to include both acquisition (stoves are purchased or installed without any reference to their later use) and initial adoption (use is assessed < 1 year from acquisition).
Adoption is defined in varied ways: adopting children to enhance and enrich our lives, adopting a new set of priorities, and the adoption of new sources of unconditional love.
In this study, adoption is defined as the use of land management practices on farmers' plots.
Thus, adoption is defined more as the degree of natural regeneration with or without farmer management/assistance.
In this paper, adoption is defined as observing MTM on a particular plot at the time of data collection.
Open adoption is defined as a biological parent or parents having an ongoing relationship with their birth child whom they placed for adoption.
Adoption was defined as the absolute number, proportion and representativeness of schools that were willing to participate in the iPlay study.
This indicates that computing preseason reach as a function of the final cohort size will give a biased picture, as shown by a comparison of figures 1 and 2. Adoption was defined as the number of players who attended training who also participated in the exercise programme.
This includes the object of adoption (SECaaS), which is defined in Subsection 2.1.
Specifically, convergence adoption rate, reflecting the reach of the diffusion, is defined as the adoption rate at which the diffusion converges.
The adoption time of a practice is defined to be the number of months between the first recorded prescription and the modelled estimate of 95% of the maximum monthly prescription rate (chosen arbitrarily to represent near-saturation as the model asymptotes at the maximum).
