The phrase "define a concept" is correct and usable in written English.
You can use it when you are asking someone to explain the meaning of a particular concept or idea. For example, "Can you please define what 'cultural relativism' means?".
Perhaps the more immediate question is whether the completed Human Genome Project will define a concept of race that is scientifically credible and useful.
Another crucial task is to define a concept of the onboard medical center and dataware including the telemedicine technology.
We show that keyword queries have structures, and define a concept called keyword query with structure (QWS) to capture query structure.
Subsequently, we define a concept model for content routing and categorize the content routing into proactive, reactive and opportunistic types, and then detail the representative schemes.
Carnap granted the importance of this concept (especially in modern physical theories) but attempted, in increasingly refined and often revised forms, to define a concept of degree-of-confirmation that was purely logical.
This inability to precisely define a concept such as race represents a risk for personal analytics.
We defined a concept of diffusion operator, which consists of local-mean diffusion operator and global-bias diffusion operator.
The interpretation mode of concepts suggested by Reif (1987 , 1995 relies on knowledge defining a concept by an explicit procedure specifying how to identify or construct the concept.
In the Grundgesetze der Arithmetik, II (1903, Sections 56 67) Frege criticized the practice of defining a concept on a given range of objects and later redefining the concept on a wider, more inclusive range of concepts.
Since he also recognized two special objects he called truth-values (The True and The False), he defined a concept to be any function that always maps its arguments to truth-values.
