Past tense of hallucinate; experienced vivid sensory perceptions of things that weren't actually there.
From Latin hallucinari meaning 'to wander mentally' or 'to talk idly.' The -ate verb suffix and past tense -ed create the full form.
The word hallucinate originally meant 'to talk foolishly' in Latin—Romans noticed that people seeing things that weren't real often babbled incoherently, so they named the mental state after the rambling speech!
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