Definitions
1.adjectiveEvil; wicked (of people).
2.adjectiveMorally reprehensible (of behaviour etc.); blameworthy.
3.adjectiveIndicative of unkind or malevolent intentions; harsh, cruel."He suffered from ill treatment."
4.adjectiveUnpropitious, unkind, faulty, not up to reasonable standard."ill manners; ill will"
5.adjectiveUnwell in terms of health or physical condition; sick."I've been ill with the flu for the past few days."
6.adjectiveHaving an urge to vomit."Seeing those pictures made me ill."
7.adjective(hip-hop slang) Sublime, with the connotation of being so in a singularly creative way.
8.adjectiveExtremely bad (bad enough to make one ill). Generally used indirectly with to be."That band was ill."
9.adjectiveUnwise; not a good idea.