Definition of "ill"
ill
/ɪl/
adjective
comparative worse or iller or more ill, superlative worst or illest or most ill
(archaic) Morally reprehensible (of behaviour etc.); blameworthy.
adverb
comparative worse or more ill, superlative worst or most ill
verb
third-person singular simple present ills, present participle illing, simple past and past participle illed
(intransitive, slang) To behave aggressively.