the science of the mind or of mental states and processes.
the science of human and animal behavior.
the sum or characteristics of the mental states and processes of a person or class of persons, or of the mental states and processes involved in a field of activity: the psychology of a soldier; the psychology of politics.
mental ploys or strategy: He used psychology on his parents to get a larger allowance.
1650s, "study of the soul," from Modern Latin psychologia, probably coined mid-16c. in Germany by Melanchthon from Latinized form of Greek psykhe- "breath, spirit, soul" (see psyche) + logia "study of" (see -logy). Meaning "study of the mind" first recorded 1748, from Christian Wolff's "Psychologia empirica" (1732); main modern behavioral sense is from early 1890s.
The scientific study of mental processes and behavior.
The behavioral and cognitive characteristics of a specific individual, group, activity, or circumstance.♦ Clinical psychology ♦ is the application of psychological knowledge to the diagnosis and treatment of patients.
The science dealing with mental phenomena and processes. Psychologists study emotions, perception, intelligence, consciousness, and the relationship between these phenomena and processes and the work of the glands and muscles. Psychologists are also interested in diseased or disordered mental states, and some psychologists provide therapy for individuals. In the United States, however, psychologists, unlike psychiatrists, are not medical doctors. (Seepsychiatry.)
The two main divisions of psychology are individual or personality psychology and social psychology; social psychology deals with the mental processes of groups.