A conceptual definition is an element of the scientific research process, in which a specific concept is defined as a measurable occurrence. It is mostly used in fields of philosophy, psychology, and communication studies. This is especially important when conducting a content analysis.

Examples of ideas that are often conceptually defined include intelligence, knowledge, tolerance, and preference.

Following the establishment of a conceptual definition, the researcher must use an operational definition to indicate how the abstract concept will be measured.

Philosophy of science