1. not in good health; sick
2. bad or harmful

1. badly or wrongly

1. harm or misfortune
Usage: formal

Examples

• She stayed home because she was feeling ill.
• The patient has been seriously ill for weeks.
• The storm brought ill effects to the coastal towns.
• He spoke ill of his former colleagues.
• The project was ill-conceived from the start.
• She could ill afford to miss another day of work.
• No ill will come from telling the truth.