delusional

de-lu-sion-al · adjective

imported

Definitions

adjective

  1. 1.

    Characterized by or holding false beliefs despite evidence to the contrary.

  2. 2.

    (psychiatry) Relating to or suffering from delusions as a symptom of mental illness.

Related words

Antonyms: lucid, rational, realistic, sane
See also: delusion, delusions, irrational, paranoid
Synonyms: deluded, irrational, paranoid, unrealistic

Etymology

Formed from delusion + -al. The word delusion comes from Latin delusio meaning "a deceiving." The adjective form became common in psychiatric usage in the 20th century.