(often pluralized) Trouble; distress; misfortune; adversity.
Music won't solve all the world's ills, but it can make them easier to bear.
Harm or injury.
I wouldn't want you to do me ill.
Evil; moral wrongfulness.
A physical ailment; an illness.
I am incapacitated by rheumatism and other ills.
PCP, phencyclidine.
Evil; wicked (of people).
Morally reprehensible (of behaviour etc.); blameworthy.
Indicative of unkind or malevolent intentions; harsh, cruel.
He suffered from ill treatment.
Unpropitious, unkind, faulty, not up to reasonable standard.
ill manners; ill will
Unwell in terms of health or physical condition; sick.
I've been ill with the flu for the past few days.
Having an urge to vomit.
Seeing those pictures made me ill.
(hip-hop slang) Sublime, with the connotation of being so in a singularly creative way.
Extremely bad (bad enough to make one ill). Generally used indirectly with to be.
That band was ill.
Unwise; not a good idea.