Psychology. Obsolete.

The study or consideration of the soul or spirit. Cf. pneumatology, n. 1. Now rare (in later use chiefly in etymologizing contexts).

The science of the nature and functions of the human mind; psychology. Now historical.

With singular or plural agreement. Psychological matters or writings; psychology. Also in extended use.

= psychology, n. 2a. Now historical.

The branch of knowledge or science which relates to the mind; philosophy of mind, psychology.

Psychology; (also) psychiatry. Frequently attributive.

Psychoanalysis, psychiatry. rare.