US: /həˌɫusəˈneɪʃən/
UK: /hɐlˌuːsɪnˈe‍ɪʃən/

English Vietnamese dictionary

hallucination /hə,lu:si'neiʃn/
  • danh từ
    • ảo giác

Advanced English dictionary

+ noun
1 [C, U] the fact of seeming to see or hear sb/sth that is not really there, especially because of illness or drugs: to suffer from / have hallucinations + High temperatures can cause hallucination.
2 [C] something that is seen or heard when it is not really there: Was the figure real or just a hallucination?
Help Note: Some people use an instead of a before hallucination and then usually do not pronounce the 'h'. This now sounds old-fashioned.

Thesaurus dictionary

fantasy, mirage, day-dream, illusion, delusion, vision, dream, aberration, chimera, phantasm, phantom, figment of the imagination, apparition, spectre, ghost; par'sthesia:
Alone at sea for a fortnight, I began having hallucinations.

Collocation dictionary


mild | weird | auditory, visual | drug-induced


For a moment I thought I was having hallucinations.
| cause, induce

Concise English dictionary

+illusory perception; a common symptom of severe mental disorder
+a mistaken or unfounded opinion or idea
+an object perceived during a hallucinatory episode