Ill adj. (compar. iller; superl. illest) 1.Contrary to good, in a physical sense; contrary or opposed to advantage, happiness, etc.; bad; evil; unfortunate; disagreeable; unfavorable. "Neither is it ill air only that maketh an ill seat, but ill ways, ill markets, and ill neighbors." "There 's some ill planet reigns."
2.Contrary to good, in a moral sense; evil; wicked; wrong; iniquitious; naughtly; bad; improper. "Of his own body he was ill, and gave The clergy ill example."
3.Sick; indisposed; unwell; diseased; disordered; as, ill of a fever. "I am in health, I breathe, and see thee ill."
4.Not according with rule, fitness, or propriety; incorrect; rude; unpolished; inelegant. "That 's an ill phrase."
Ill at ease, uneasy; uncomfortable; anxious. "I am very ill at ease."
Ill blood, enmity; resentment; bad blood.
Ill breeding, lack of good breeding; rudeness.
Ill fame, ill or bad repute; as, a house of ill fame, a house where lewd persons meet for illicit intercourse.
Ill humor, a disagreeable mood; bad temper.
Ill nature, bad disposition or temperament; sullenness; esp., a disposition to cause unhappiness to others.
Ill temper, anger; moroseness; crossness.
Ill turn. (b)A slight attack of illness. (Colloq. U.S.) Ill will, unkindness; enmity; malevolence.
Synonyms: Bad; evil; wrong; wicked; sick; unwell.