Not in good health; sick or unwell. She felt too ill to go to work today.
There was an ill feeling between the two neighbors after the argument.
He was known for his ill intentions towards his competitors.
The ill weather conditions forced the event to be postponed.
That new video game is absolutely ill.
In a poor or unsatisfactory manner. He performed ill in the competition, failing to meet the expectations.
With difficulty or hardship. She could ill afford to lose any more time on the project.
In a harmful or detrimental way. The policy was ill received by the public, leading to widespread criticism.