ill (ills plural )
1 adj Someone who is ill is suffering from a disease or a health problem.
usu v-link ADJ
In November 1941 Payne was seriously ill with pneumonia...
People who are ill in some way can be referred to as, for example, the mentally ill., n-plural the adv N
I used to work with the mentally ill...
2 n-count Difficulties and problems are sometimes referred to as ills.
FORMAL usu pl, usu with supp
His critics maintain that he's responsible for many of Algeria's ills.
3 n-uncount Ill is evil or harm.
LITERARY They say they mean you no ill.
4 adv Ill means the same as `badly'.
FORMAL ADV with v
The company's conservative instincts sit ill with competition.
5 adj You can use ill in front of some nouns to indicate that you are referring to something harmful or unpleasant.
FORMAL ADJ n
(=bad)
She had brought ill luck into her family...
6 If you say that someone can ill afford to do something, or can ill afford something, you mean that they must prevent it from happening because it would be harmful or embarrassing to them.
FORMAL
♦
can ill afford phrase PHR to-inf, PHR n
It's possible he won't play but I can ill afford to lose him...
7 If you fall ill or are taken ill, you suddenly become ill.
♦
fall ill/be taken ill phrase V inflects
Shortly before Christmas, he was mysteriously taken ill...
8
→
to speak ill of someone
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speak