Psychology or psychiatry. / A psychologist; a psychiatrist.

(slang) Indicating that one's preceding statement was false and that one has successfully fooled one's interlocutor. / (dated, slang) An interjection of surprised happiness.

(informal) Psychedelic. / (informal) Psychiatric.

(transitive, reflexive) To put (someone) into a required psychological frame of mind (also psych up). / (transitive) To intimidate (someone) emotionally or using psychology (also psych out).

Alternative form of psycho-

present participle of psyche

Third-person singular simple present indicative form of psych

plural of psych

(Greek mythology, Roman mythology) The personification of the soul. Originally a mortal princess who later married Eros/Cupid, (the god of love), was deified, and bore him a daughter, Hedone/Voluptas.

The human soul, mind, or spirit. / (chiefly psychology) The human mind as the central force in thought, emotion, and behavior of an individual.