(Greek mythology) the Greek personification of death; son of Nyx
(psychoanalysis) an unconscious urge to die
the death drive in Freudian psychoanalysis.
The god of death (specifically of a peaceful death), and twin brother of Hypnos (god of sleep); the Greek counterpart of Mors.
Thanatos comes from Ancient Greek, where it originally meant death or the personification of death as a god.