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a statement of the meaning of a word or phrase.
conceptual definition an identification of the personal knowledge or connotative meaning of a word. These meanings are often difficult to express; the meaning is “known” but not easily put into words.
operational definition a definition, method, or procedure used to measure or represent a concept or variable in a specific situation.
target definition the definition of a specific target that is identified on the intervention scheme of the omaha system.


In optics, the power of a lens to give a distinct image.
See also: resolving power.
[L. de-finio, pp. -finitus, to bound, fr. finis, limit]


Imaging The clearly delineated limit of a thing visible by the eye. Cf Resolution.


In optics, the power of a lens to give a distinct image.
See also: resolving power
[L. de-finio, pp. -finitus, to bound, fr. finis, limit]


establishment of a clear boundary, a clear line of demarcation.

clinical definition
an accurate description of the disease in terms of clinical signs and clinicopathological findings.
epidemiological definition
an accurate description of the disease in terms of its epidemiological parameters of when, where, why and how it has occurred.
genetic definition
an accurate description of a disease in terms of the familial relationships between affected animals.
radiographic definition
a sharp line of demarcation between radiographic densities. A gradual merging of densities creates blurring of the image.

Patient discussion about definition

Q. What is the Definition of Anemia? My doctor told me I have anemia, based on my latest blood tests. What is anemia?

A. In laymans terms it is low iron. Most women get it sometime in their lives due to menstration and other factors. You need to increase your iron intake. Lots of beets, beans, spinich, and lots of other foods can help.

Q. what is the definition of Autism? how would i know if one is autistic and the other one is not , or has only minor disorder ?

A. Autism is a brain development disorder that is characterized by impaired social interaction and communication, and restricted and repetitive behavior, all starting before a child is three years old. This set of signs distinguishes autism from milder autism spectrum disorders (ASD) such as pervasive developmental disorder not otherwise specified. Diagnosis should be made if suspected, by a specialits in child psychiatry or child developement.

Q. What is the definition of Autism?

A. Autism is defined by symptoms from each of the following three categories: qualitative impairment in social interaction, impairment in communication, and restricted repetitive and stereotyped patterns of behavior or interests.

By definition, the onset of autistic disorder is before the age of 3 years, although in some cases, it is not recognized until a child is much older.

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References in periodicals archive ?
an abstract conceptual definition will fulfill the requirements of the
A worthy exercise is to view the conceptual definition of literacy from outside the arena of financial services.
A concept's measure is only as good as its formal conceptual definition (Bunge 1967 and numerous others).
Interesting, most SEAs reported changes in some aspect of their SLD conceptual definition or classification criteria since 1994 (N = 34), and 40% of SEA contact persons anticipated changes in the near future.
Although the planning process may seem tedious, the time invested will pay off in the next phase, conceptual definition.
In the process of transitioning from what it calls the "joint conceptual definition phase" to the "joint definition phase" of the CSeries, Bombardier has made a number of tweaks to the aircraft.
Kruse and Hale, in addition to summarizing the other papers in the symposium, summarize the conceptual definition issues and measurement approaches.
The purpose of this book is to reference marketing or consumer behavior scales that meet the authors' criteria--scales with a theoretical base and/or conceptual definition, multiple items, relevance to marketing or consumer behavior, development using scaling procedures, and estimates of reliability and/or validity.
A broad-based approach that would address the conceptual definition of earnings was not recommended.
It provides a conceptual definition of innovation that expands beyond research and development activities, as well as providing a draft set of principles to potentially guide innovation in Alberta.
Although educational communications has been accepted as an independent field of study for nearly 40 years, there still is not agreement on its conceptual definition and boundaries in Turkey.