1. to see, hear, or experience something that is not really there, especially due to illness or drugs
Usage: medical; psychological

Examples

• The fever made him hallucinate strange creatures in his room.
• She began to hallucinate after taking the medication.
• Patients with this condition often hallucinate voices.
• The drug can cause people to hallucinate vivid colors.
• He was hallucinating due to severe dehydration.
• The doctor explained that stress can sometimes make people hallucinate.