Definition

1. Verb:
   • To perceive something that is not actually present; to have a sensory experience of something that does not exist in reality. This typically refers to seeing, hearing, feeling, smelling, or tasting things that are not there, often due to mental illness, drug use, extreme fatigue, or other conditions affecting the brain.

Usage

• The verb "hallucinate" describes the involuntary experience of false perceptions. It is an intransitive verb (e.g., "The patient began to hallucinate.") but can also be used transitively with the thing perceived (e.g., "He hallucinated giant spiders.").
• It is most commonly used in medical, psychological, and informal contexts to describe a symptom or an effect.

Examples

• Verb:
  • The fever was so high that she started to hallucinate.
  • Some people hallucinate when they are severely sleep-deprived.
  • The drug can cause users to hallucinate vividly.

Advanced Usage

• "to hallucinate that...": This construction is used to describe the specific content of the hallucination.
  • He hallucinated that the walls were melting.

Variants and Related Words

• Hallucination (noun): The experience or the thing perceived during hallucinating.
  • The hallucinations were terrifying.
• Hallucinatory (adjective): Relating to or resembling a hallucination.
  • He was in a hallucinatory state.
• Hallucinogen (noun): A substance that causes hallucinations.
  • LSD is a powerful hallucinogen.

Synonyms

• See things: (informal) To hallucinate, especially visually.
• Have visions: Often implies seeing things, sometimes with a mystical or prophetic connotation.

Antonyms

• Perceive accurately: To see or understand things as they truly are.
• Be lucid: To be thinking clearly and rationally.

Verb

1. perceive what is not there; have illusions