1. An acutely disturbed state of mind resulting from illness, intoxication, or other causes, characterized by restlessness, illusions, hallucinations, and incoherence of speech and thought
The patient was in a state of delirium due to the high fever.
O paciente estava em estado de delírio devido à febre alta.
2. Wild excitement or ecstasy; uncontrolled enthusiasm
The crowd was in delirium when their team won the championship.
A multidão estava em delírio quando seu time venceu o campeonato.