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Related to deliriant: dissociative
n. pl. de·lir·i·ums or de·lir·i·a (-ē-ə)
1. A temporary state of mental confusion and fluctuating consciousness resulting from high fever, intoxication, shock, or other causes. It is characterized by anxiety, disorientation, hallucinations, delusions, and incoherent speech.
2. A state of uncontrolled excitement or emotion: sports fans in delirium after their team's victory.
[Latin dēlīrium, from dēlīrāre, to be deranged : dē-, de- + līra, furrow; see leis- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.