1. in a state of delirium; with wild, confused, or incoherent speech or behavior
Usage: often used to describe someone with a high fever or severe illness
2. in an extremely happy, excited, or ecstatic manner
Usage: informal usage; often hyperbolic

Examples

• The patient was deliriously muttering about things that made no sense.
• She was deliriously happy when she found out she had won the scholarship.
• He laughed deliriously as the fever took hold.
• The couple danced deliriously at their wedding reception.
• The crowd cheered deliriously when their team scored the winning goal.
• After days without sleep, he spoke deliriously and could barely stand.