(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.